Switching back to Openreach after an altnet

The offer from the network digging up your street is cheaper than what you pay now, and the hesitation is almost never about the price. It is about the door out. Switching back to Openreach if the altnet disappoints is the quiet condition on the whole decision, and most households sign without ever checking it.

The short answer is that you can. The longer answer, and the one worth having before you order rather than eighteen months into it, is that what you would be going back to may not be what you left.

Can you leave an altnet and go back?

Yes. Taking broadband from an alternative network signs nothing away, and leaving one works the same way as leaving anybody else. Since September 2024 every fixed broadband and landline switch in the UK has run through a single industry process, and it covers moves between different networks rather than only moves between providers who share one. Going from an altnet to a BT, Sky, TalkTalk, Vodafone or Plusnet line sits squarely inside it.

You contact the provider you want to join, and nobody else. They tell your current provider you are leaving, the two of them settle on a date, and the old service stops on it. Openreach describes the same process from the network side. Our guide to how switching actually works covers the timings in full.

The part that matters here is the money. Under the switching rules you do not pay notice period charges that run past the switch date, so you should not be billed by two companies for the same weeks. Early exit charges are a separate question and the process does not touch them.

How switching back to Openreach actually works

The first thing to straighten out is that you cannot buy anything from Openreach. It builds and maintains the network and sells access to retail providers, so switching back to Openreach means signing up with one of the companies that use it. BT, Sky, TalkTalk, Vodafone and Plusnet are the familiar names, and plenty of smaller providers sit on the same wires. Our guide to what separates altnets from Openreach covers that split.

From there it is an ordinary order. You give the new provider your address, they check what the network can offer at that address, and they book a start date. If an Openreach service is already live at your property the changeover can be quick. Usually it will not be, because moving to the altnet is what ended it. Expect a fresh installation with an engineer rather than a line that simply wakes back up.

Will your old copper line still be there?

Quite possibly not, and this is the thing to check before you leave rather than after. Openreach is retiring its copper network exchange by exchange. Once around three quarters of the premises served by an exchange can get its full fibre, it stops providers selling the older copper based products at the addresses where that full fibre is available.

The programme is running in batches. Openreach has been adding exchanges to it through 2026, and ISPreview reported a further 112 areas listed in July 2026. The practical effect is that the ADSL or part fibre service a household left behind is often not something a new provider can put back.

That is less alarming than it sounds. Where Openreach full fibre has reached your address, going back means going back to full fibre, which is the better product anyway. Where it has not reached you, copper and part fibre services can generally still be ordered, so nobody is stranded. The case worth thinking about is the one in between: you left a copper service, full fibre has arrived since, and returning now means a full fibre installation and a new box on the wall rather than a router plugged into the old socket.

What happens to the altnet cable and box?

The cable and the unit on your wall belong to the network that installed them, and no regulator rule says what has to happen to either when you go. In practice the fibre tends to stay where it is, because removing it costs more than leaving it. The router is usually treated differently and is often asked for back, sometimes with a charge attached if it does not arrive.

Because this lives in the provider’s own terms rather than in the rules, read the section on ending your service before you order, not afterwards. Fibre left in place is quietly useful, too. The disruptive part of an altnet installation is the digging and the drilling, and a house that has already had it done is easy to reconnect if you change your mind a second time.

What leaving early costs

The switching process does not cancel an early termination charge. Inside a minimum term, leaving still costs whatever the contract says it costs, and the sum is worked out from the months you have left rather than charged as a flat fee. Our guide to broadband exit fees goes through how that is calculated and what can reduce it.

This is where the length of the contract matters more than it looks. Several of the networks we track sell short or rolling terms alongside the long ones, and the gap between a rolling contract and a two year one is the gap between an experiment and a commitment. If the door out is what worries you, the term you sign is the door, not the technology behind it.

Three things worth checking first

None of this is an argument against altnets. It is an argument for asking three questions while you still have the leverage of not having ordered yet.

• What Openreach already offers at your address. If its full fibre is there, your route back is straightforward. If your address is still on copper, find out whether the exchange has been listed for withdrawal, because that decides what can be sold to you later.
• The minimum term, and what leaving early costs. This is the number that decides how reversible the decision is. A short term makes the rest of this guide largely academic.
• What the terms say about equipment. Specifically, whether the router has to go back and whether anything is charged if it does not.

The honest trade off is that an altnet is usually cheaper and often faster, and the route back is real but no longer identical to the route you came in on. Our guide on whether altnets are safe to switch to covers the other half of the worry, which is what happens if the company itself does not last.

Frequently asked questions

Do I need to ring my altnet to cancel?

No, and it is better not to. The switching process puts that contact in the hands of the provider you are joining, so you place the order with them and they notify your current network. Cancelling separately means arranging the end of one service and the start of another yourself, which is the coordination the rules were written to take off you.

Will I need an engineer visit to go back?

Usually, if the Openreach service at your address was ended when you moved to the altnet. A line left in place can sometimes be brought back without a visit, but a full fibre connection needs a physical installation and a box fitted inside the house. Ask the provider you are joining what the order involves before you agree a start date, because the answer decides how long you wait.

Can I get the same copper deal I had before?

Often not. Openreach is withdrawing its copper based products exchange by exchange, and where its full fibre is available at your address those older services can no longer be sold. Where full fibre has not reached you, copper and part fibre can generally still be ordered. Either way it is a new contract at current prices rather than the old one starting up again.

Does going back cost anything beyond the exit fee?

It can. An early termination charge is the main one, and some providers also charge for a router that is not sent back. What you should not be paying is two companies for the same weeks: under the switching rules, notice period charges do not run past the switch date, so anything billed beyond it is worth challenging.

How long does switching back take?

It depends on whether the connection is already there. Where the network reaches your address and no engineer is needed, a switch is measured in days. Where a new line has to be installed, the wait is set by the installation appointment rather than by the switching process, and that can run to a few weeks. Your new provider should give you a date when you order.