Business broadband switching without downtime: the 2026 UK guide

1. How UK broadband switching works in 2026

Switching UK broadband in 2026 is fundamentally easier than it was before September 2024. The launch of One Touch Switch (OTS) on 12 September 2024 means UK customers no longer need to coordinate between two providers; the incoming provider handles everything including cancelling the old contract. This applies to most UK consumer and business broadband on Openreach networks, plus most altnet networks (CityFibre, Trooli, Hyperoptic, Community Fibre, Gigaclear, YouFibre, BeFibre, Zen, and many smaller ISPs), plus Virgin Media O2 cross-network switches.

The basic UK switching workflow in 2026:

1. You contact only the new provider via their website or phone, choose your package, and provide your address and current provider details.
2. The new provider initiates the switch through TOTSCo (The One Touch Switching Company), the central UK platform that handles information exchange between providers.
3. Your old provider receives the switch notification and confirms or queries any contract terms (such as remaining minimum term). If you are still in your contract, the new provider tells you whether early termination charges may apply before the switch proceeds.
4. An activation date is agreed, typically 5 to 15 working days from the order. For same-network Openreach switches, this is often a fast soft-handover with no engineer needed; for cross-network switches involving cable or new altnet lines, an engineer appointment may be needed.
5. On the activation date, the new connection comes live and the old service stops. For UK Openreach-to-Openreach switches, the typical downtime is 1 to 2 hours during the handover. For cross-network switches, both lines may run in parallel for some time.
6. You receive automatic Ofcom-mandated compensation if the switch is delayed (£6.24 per day under current rules), if an engineer appointment is missed (£31.19 per missed appointment), or if there is a total loss of service for an extended period.

2. The One Touch Switch process step by step

One Touch Switch is the official Ofcom-mandated UK switching process introduced on 12 September 2024. It applies to most UK fixed-line broadband switches including all major ISPs and most altnets. Understanding the specific steps helps UK SMEs plan around the switch and avoid surprises.

1. Choose your new UK broadband provider and package based on postcode-level availability, contract terms, total cost over the full term (see our contract lengths guide), and any additional features (4G backup, static IP, SLA).
2. Place the order with the new provider only. You will be asked for your current provider name and account details so the new provider can match your line in the TOTSCo Hub. Most UK providers do this through an online checkout flow taking under 5 minutes.
3. Receive the switching information notification. Within typically 1 to 5 working days, both providers send notifications confirming the switch including the activation date, any contract terms still in place at the old provider (such as ETCs if applicable), and the right to cancel the new order within 14 days under UK consumer regulations.
4. Review the notification carefully. Check the activation date works for your business (avoid switching on a peak trading day; early morning or out-of-hours is typically better for retail and hospitality). Check any quoted ETCs match what you expect from your old contract.
5. If everything looks correct, do nothing further. The switch proceeds automatically on the agreed date. If there is an issue (wrong address, wrong package, ETC larger than expected), contact the new provider before the cooling-off period ends.
6. On the activation day, the new service comes live and the old service deactivates. For UK Openreach-to-Openreach switches, this is a soft handover taking 1 to 2 hours typically; for cross-network switches an engineer appointment may be needed first.
7. Test the new connection thoroughly on the activation day: speed test, check VoIP and phone systems, confirm card payments and EPOS work, verify any external services that depend on connectivity.
8. Return any old equipment as requested by the previous provider. Most UK ISPs send a pre-paid return bag for routers; failing to return can incur charges of £30 to £100. See our router return charges guide.

3. UK provider One Touch Switch coverage in 2026

One Touch Switch coverage was nearly universal among UK ISPs by early 2025 and is comprehensive in 2026. This table shows current OTS coverage and any quirks for each major UK provider.

4. Switch types and realistic downtime expectations

Realistic downtime during a UK business broadband switch in 2026 depends entirely on whether the new and old providers use the same underlying network or different networks. This is the single biggest factor in planning the switch around your trading hours.

The pattern that matters for UK SMEs: switching to a different network type (especially to or from Virgin Media cable, or to or from a new altnet line) often involves zero downtime because the new line is installed before the old line is cut off. Switching within the same Openreach network is where the 1 to 2 hour handover window applies; for UK retail or hospitality, schedule this for a low-trade time (early morning, mid-afternoon mid-week, or out of hours).

5. Pre-switch checklist for UK businesses

UK SMEs that prepare properly for a broadband switch face genuinely minimal disruption. Most issues arise from missing one or two preparation steps that would have been quick to handle if known in advance. This checklist covers everything UK SMEs should confirm before scheduling a switch in 2026.

1. Confirm the new provider has full coverage at your exact address. Use postcode-level availability checking on the provider site or our compare tool. Coverage at neighbour addresses is not the same as coverage at yours; UK altnets in particular often have street-by-street coverage variation.
2. Calculate the realistic total cost over the full contract term including any mid-contract price rises (see our contract lengths guide). The headline monthly price often understates total cost; make the comparison at total-cost level.
3. Check for early termination charges (ETCs) on your existing contract. If you are still in the minimum term, the old provider will quote an ETC during the OTS notification. Calculate whether the saving from switching now exceeds the ETC; if not, wait.
4. Identify all systems that depend on broadband at your premises. Card terminals, EPOS, VoIP phones, CCTV, security alarms, smart locks, smart heating, video doorbells, IoT devices, and anything in the cloud. This list determines the post-switch verification scope.
5. Check for IP allowlisting or static IP dependencies. If your business uses cloud platforms or banking systems that allowlist by IP, you will need to update those allowlists with the new provider's IP after the switch. See our static IP guide for the detail.
6. Plan for VoIP and phone number continuity. Most cloud-hosted VoIP (Microsoft Teams Phone, RingCentral, 8x8) is unaffected by broadband switches because the phones connect outbound to the cloud platform. On-premises PBX systems may need configuration updates. See section 8.
7. Schedule the switch for a low-trade time. For UK retail and hospitality, early morning before opening or after closing. For UK B2B services, mid-afternoon mid-week typically. Avoid Saturdays and Sundays for retail; avoid Mondays mornings (busy) and Friday afternoons (limited support if issues arise).
8. Consider 4G backup as belt-and-braces protection during the switch. A standalone 4G backup router (Draytek, TP-Link, MikroTik) plus a UK business SIM costs ~£200 plus £15 per month + VAT and provides genuine continuity if anything goes wrong on switch day. See our 4G backup guide for the detail.
9. Communicate the switch to staff in advance. Explain the planned downtime window, what to do if card payments fail (typically the terminal switches to its own 4G), and who to contact for help on the day.
10. Document existing network configuration before the switch. Photograph router admin pages, note Wi-Fi network names and passwords, save VLAN configurations, document any port forwarding. After the switch you will likely need to reconfigure some of this on the new router.

6. Same-network vs cross-network switches compared

The most important practical distinction in UK 2026 broadband switching is whether the switch is same-network (between providers using the same physical infrastructure) or cross-network (between providers on different physical networks). The two have meaningfully different timelines, downtime, and risk profiles.

Same-network UK switches

Same-network UK switches are typically between two providers using Openreach infrastructure. Examples: BT to Sky, Sky to Vodafone, Plusnet to TalkTalk, EE to Zen. Both providers use the same physical line into the premises; the switch is essentially a billing and provisioning change rather than a physical infrastructure change.

• Typical timeline: 10 working days from order to activation.
• Typical downtime: 1 to 2 hours during the handover window on activation day.
• Engineer visit: Usually no, unless upgrading from FTTC copper to FTTP fibre, in which case an Openreach engineer fits the ONT.
• Risk: Low; same-network switches very rarely fail. Most issues are configuration on the customer side rather than provisioning failures.
• Best for UK SMEs: Where the new provider on the same network offers a meaningfully better price, contract terms, or support; the switch is fast and low-risk.

Cross-network UK switches

Cross-network UK switches involve two providers on different physical networks. Examples: BT (Openreach) to Virgin Media (cable); Sky (Openreach) to Hyperoptic (own fibre); TalkTalk (Openreach) to Trooli (own fibre); Vodafone (Openreach or CityFibre) to Community Fibre (own fibre). These switches require physical installation of new infrastructure at the premises before the switch can complete.

• Typical timeline: 10 to 20 working days, sometimes longer for altnet rollout pending.
• Typical downtime: Often zero on the cutover day because both lines run in parallel during the install phase; physical cutover is then minimal.
• Engineer visit: Yes, the new network's engineer fits new equipment (Virgin Media SuperHub, altnet ONT, often a small wall-mounted optical box).
• Risk: Moderate; engineer appointment can be delayed, premises access for installation may be needed, and the new line may need testing before full cutover.
• Best for UK SMEs: Where the new network offers significantly better speeds (full-fibre upgrade), cost (UK altnet pricing), or features (Virgin Media gigabit cable, altnet symmetric speeds).

7. Business broadband-specific switching considerations

UK business broadband switching has several considerations beyond consumer switching. Understanding these in advance helps UK SMEs plan around them rather than discover them mid-switch.

• Business contract ETCs are typically higher than consumer ETCs. UK business contracts are often 24 to 36 months and ETCs include not just remaining monthly fees but also any setup, installation, or equipment costs. Calculate the ETC before initiating a switch; for UK business broadband, this number is often £400 to £1,500 depending on contract length remaining and original setup costs.
• Static IP allowlisting will need updating after the switch. If your UK SME has external systems, banking platforms, partner networks, or remote access tools that allowlist by your current IP address, you must update those allowlists with the new provider's IP after the switch. Plan this update for switch day so allowlisted access is restored quickly.
• Business SLAs do not transfer. If you have a 6-hour fix SLA on your current UK business broadband (BT Halo for Business, Virgin Media Business Voom, similar), you start a new SLA clock with the new provider. Make sure the new provider's SLA matches or exceeds the old one if SLA matters for your business.
• VoIP phone numbers and SIP trunks need explicit handling. See section 8. This is the single most common UK SME switching issue; phone numbers and SIP trunks do not automatically transfer with the broadband switch.
• Business broadband often has different cooling-off and cancellation rules from consumer broadband. Some UK business contracts have shorter cooling-off periods (3 to 7 days), some have none. Read the new contract carefully before signing.
• Card payment terminals and EPOS may need network reconfiguration. Many UK card terminals and EPOS systems are tied to the specific Wi-Fi network name and password from the old provider's router; after the switch, they need to connect to the new router. Plan for 30 to 60 minutes of post-switch reconfiguration on your card payment hardware. See our card machines and EPOS guide.
• Multi-site UK businesses need staggered switches. Switching all sites simultaneously concentrates risk; staggering switches across sites over several days or weeks gives a fallback if any single switch encounters issues. Order multi-site switches 2 to 4 weeks in advance for proper scheduling.

8. VoIP and phone number considerations during switching

VoIP and phone number continuity is the single most common issue UK SMEs encounter when switching business broadband. The good news is that most issues are entirely manageable with proper planning; the bad news is that without planning, UK SMEs sometimes lose phone calls for hours or days during the switch.

Key UK 2026 VoIP and phone considerations during a broadband switch:

1. Cloud-hosted VoIP is largely unaffected by broadband switches. Microsoft Teams Phone, RingCentral, 8x8, Vodafone PBX Cloud, BT Cloud Voice, Sky VoiceEdge all work because the phones connect outbound to the cloud platform. Once the new broadband is up, the phones reconnect automatically. Brief downtime equals brief unavailability of inbound calls; calls go to voicemail and resume normally afterwards.
2. On-premises PBX systems need explicit handling. Self-hosted UK VoIP systems (3CX, Asterisk, FreePBX, on-premises Avaya or Mitel) need both a working broadband connection and proper SIP configuration to receive inbound calls. If you have a static IP that is changing during the switch, your SIP trunk provider needs the new IP to route calls correctly. Coordinate with the SIP trunk provider 1 to 2 weeks before the switch.
3. Phone number porting is separate from OTS. If you want to keep your existing phone numbers when switching from one VoIP service to another (for example BT Cloud Voice to RingCentral), you initiate a number port separately. This typically takes 5 to 15 working days and is independent of the broadband switch. See our what happens to my number when I switch guide.
4. The PSTN switch-off (31 January 2027) affects what is possible. Traditional analogue or ISDN phone lines are being retired; UK businesses still on these lines should migrate to VoIP before the switch-off date regardless of any broadband switch. See our Digital Voice guide.
5. SIP trunk static IP allowlisting needs updating. Many UK SIP trunk providers allowlist customer IPs for security. If your UK SME has a static IP and you change provider, the SIP trunk provider needs the new static IP added to the allowlist. If you keep the same VoIP provider but change broadband, this is often automatic; if you change both, coordinate explicitly.
6. Test all phone scenarios after the switch. Make and receive an outbound call, an inbound call to each main number, a transfer, a conference call, voicemail retrieval. This 10-minute test catches the majority of post-switch VoIP issues before they affect customers.

9. What to do during the switch window

The switch window itself (typically the activation day, lasting 1 to 2 hours of brief downtime for same-network Openreach switches, or zero hours for cross-network switches with parallel install) is when most UK SMEs make small mistakes that turn into bigger problems. This section covers exactly what to do during that window.

1. Have the new router ready and accessible at the premises. Most UK providers ship the router 3 to 7 days before activation; place it physically near the existing router so swapping is easy. Have the username and password ready for any PPPoE configuration if needed.
2. At the start of the switch window, take a final speed test on the old line. Document the result; this is your baseline if the new line underperforms.
3. For same-network Openreach switches, simply wait for the line to drop. This typically happens at a specific time the new provider has communicated. When the old line stops working, the broadband cabinet is being reprovisioned for the new provider.
4. Once the line is reprovisioned, plug in the new router (or update the existing router if the new provider supports BYO). Most modern UK business broadband routers (BT Smart Hub 2, Sky Business Hub, Vodafone Ultra Hub, Virgin Media Business Hub) provision automatically once connected to the line.
5. Verify the new connection is up by visiting whatismyip.com or running a speed test. Check the public IP if you have a static IP and update any external systems that need the new value.
6. Reconnect critical hardware. Card terminals, EPOS systems, CCTV, printers, and other devices that connect by Wi-Fi may need the new Wi-Fi password configured. Many UK SMEs find it easier to set the new router's Wi-Fi name and password to match the old one for quick reconnection.
7. Test card payments specifically before the next trading transaction. Run a £1 test transaction through each terminal to confirm authorisation works correctly. This is the single most important post-switch test for UK retail and hospitality.
8. Monitor the connection for the first hour for any instability or speed issues. If problems persist beyond the first hour, contact the new provider's support; some issues are easily fixed with a simple line refresh on their end.

10. Engineer visits and physical installations

Engineer visits during UK broadband switching are most common for cross-network switches (Openreach to Virgin Media cable, Openreach to UK altnet, altnet to altnet on different infrastructure) and for technology upgrades (FTTC to FTTP). Understanding what to expect helps UK SMEs plan around the appointment.

What to expect from a typical UK engineer visit in 2026:

• Appointment slots are typically 4-hour windows (morning 8am-1pm or afternoon 1pm-6pm) on Openreach; some altnets offer narrower slots. All-day appointments are increasingly rare.
• Premises access may be needed inside as well as outside. Openreach FTTP installs typically need indoor wall fitting for the ONT (small wall-mounted optical termination unit, about 15cm × 10cm). Virgin Media cable installs need indoor coax routing. Altnet installs vary by network.
• Typical install duration is 1 to 3 hours for most UK fixed-line installs. Complex installs (cable through difficult building structures, multi-storey premises, listed buildings) can take longer.
• What the engineer brings: the ONT or modem, any required cable, sometimes the router (if supplied by the new provider). They typically do not bring extra Ethernet cable for runs longer than 5-10 metres; if you need a long run, plan that yourself.
• What the engineer does: pull cable from the network into the premises, fit the ONT or modem on the wall, connect to the line, test the connection, hand over once the connection is stable.
• Missed appointment compensation: Ofcom rules require automatic compensation of £31.19 per missed engineer appointment under the current 2026 scheme. This is paid as a credit on the next bill from the provider that scheduled the appointment.

11. Automatic compensation for delayed switches

UK customers are entitled to automatic compensation under Ofcom rules if a broadband switch is delayed or affected by service issues. This is paid automatically as a credit on the bill, with no need to claim, in most cases. UK SMEs should know the specific amounts and what triggers them.

The automatic compensation scheme is one of Ofcom's stronger consumer protections. UK customers do not need to apply; the provider is required to credit the amount automatically once the qualifying issue is identified. In practice, UK SMEs occasionally need to chase up the credit if the provider's billing system has not applied it, but the right to receive it is automatic.

12. After the switch: what to verify

The switch is not complete just because the new line is up; UK SMEs should run a structured post-switch verification to confirm everything that depends on broadband is working correctly. Most issues that turn into customer-affecting problems are easily caught at this point.

1. Speed test the new connection at multiple times (immediately after switch, end of day, next morning). Confirm the speeds match what was contracted. If consistently below the contracted minimum guaranteed speed, raise with the provider.
2. Verify all card payment terminals are working. Run £1 test transactions through each. Confirm the receipts print, the EPOS sales reporting captures the transaction, and the funds appear in the merchant account.
3. Test VoIP phones thoroughly. Outbound call, inbound call to each main number, call transfer, conference call, voicemail. Check that ringing patterns and caller ID work correctly.
4. Confirm EPOS, CCTV, and any cloud-based business apps are connecting normally. Cloud EPOS (Square POS, Lightspeed, Epos Now, Touchbistro) should sync sales data; CCTV should be reachable remotely if you have remote access configured; cloud apps (Microsoft 365, Google Workspace, Xero, Salesforce) should authenticate and load.
5. Update IP allowlisting on external systems if you have a static IP and the IP changed during the switch. Banking platforms, partner-supplier networks, IP-allowlisted cloud platforms, and remote IT management tools may need the new IP added.
6. Check guest Wi-Fi is working with proper segmentation. If you offer guest Wi-Fi, confirm guest devices can connect and access the internet but cannot reach payment terminals or business systems. See our guest Wi-Fi guide.
7. Verify any 4G backup is configured correctly with the new router. Provider-bundled backup (BT Hybrid Connect, Sky Stay Connected, Vodafone Pro II 4G Backup) should activate automatically; standalone backup (Draytek, TP-Link, MikroTik dual-WAN routers) may need failover rules updating.
8. Return the old equipment. Most UK ISPs supply a pre-paid return bag for the old router and any other equipment. Return within the timeframe specified (typically 28 to 30 days) to avoid charges of £30 to £100. Save proof of postage in case any dispute arises later.
9. Update any business documentation referring to the old provider, account number, or technical details. If you have a written disaster recovery or business continuity plan, refresh it with the new connection details.

13. Five questions to ask before scheduling a switch

1. Is my chosen new provider available at this exact UK address with the speed tier I want? Confirm postcode-level availability before placing the order. UK altnet coverage in particular varies street by street; do not assume coverage from neighbouring addresses.
2. What is the early termination charge if I am still in my current contract? Calculate this before initiating any switch. For UK business broadband, ETCs are often £400 to £1,500 depending on contract length remaining and original setup costs. If the saving from switching does not exceed the ETC, wait until the contract ends.
3. Is the switch same-network or cross-network, and what is the realistic downtime? Same-network Openreach switches: 1-2 hours typically. Cross-network switches with engineer install: often zero downtime due to parallel-running phase. Plan trading hours around the realistic window.
4. What happens to my VoIP, phone numbers, and SIP trunks during the switch? Cloud-hosted VoIP is largely unaffected; on-premises PBX systems need explicit handling. Phone number porting is separate from OTS and takes 5 to 15 working days. Plan VoIP as a parallel workstream if your business depends on it.
5. Do I have 4G backup or contingency planning if anything goes wrong on switch day? For UK businesses where downtime would directly cost trading revenue, a temporary or permanent 4G backup connection is genuinely worth the £200 to £400 cost as belt-and-braces protection. See our 4G backup guide for the detail.