eSIM for the United Kingdom: Post-Brexit Roaming, Explained

Since Brexit, there is no single answer to "does my phone work in the UK". The EU roaming rules no longer apply to Britain, and whether you are charged depends entirely on which European operator you are with and which tariff you are on. Some include the UK voluntarily; many do not. This guide explains how to find out, and what the alternative costs.

Is the UK still covered by EU roaming?

No, not as a legal guarantee. The UK left the EU roaming area, so "roam like at home" no longer obliges your operator to include it. Some European operators kept the UK in their included zone voluntarily; others moved it into a chargeable band. The outcome depends on your specific tariff.

This is the key difference from every other destination in this series. For Japan, Turkey, the US and Morocco, the answer is a flat no. For the UK it is genuinely "check" — and two people on different tariffs from the same operator can get different answers. Do not rely on what a friend tells you, and do not rely on what was true on a trip two years ago. Operators have changed their UK policy repeatedly since 2021.

How do I check whether my tariff includes the UK?

Open your operator's app or account area, find the international roaming section, and look for the United Kingdom specifically — not "Europe", which may no longer include it. The entry will show either "included", a daily bundle price, or per-megabyte rates. Screenshot it before you travel.

If the app is vague, the tariff's terms-and-conditions document is definitive, and customer support can confirm in writing. Two details to check beyond the yes/no: whether the included data in roaming is capped below your monthly allowance — fair-use limits are common and often far lower than the headline figure — and whether calls and SMS are treated the same way as data. A tariff can include UK data while charging for calls.

If the answer is "included, with a sensible cap", you do not need anything else and should not buy a data plan. We would rather tell you that than sell you something redundant.

Which network does a travel eSIM use in the UK?

Plans for the UK in our catalogue run on EE, with 5G coverage. EE has the widest geographic reach of the British networks, covering the cities, the motorway network, most of Wales and Scotland's populated areas, and the main rail corridors between them.

Rural Scotland, mid-Wales and parts of the South West still have genuine gaps, as they do on every UK network. Underground, the London tube now has mobile coverage across much of the network, which it did not a few years ago — a change worth knowing if your last visit predates it.

What do eSIM plans for the United Kingdom cost?

Our UK catalogue currently holds 26 plans. Prices start from around €3.99 for 1 GB over 7 days, and unlimited plans begin from about €10.49. The range covers everything from a weekend in London to a month-long stay.

Treat these as indicative figures only. The table rendered on this page reads live catalogue prices, so what it shows is current. Written prices in a guide drift out of date within weeks, and a stale number is worse than no number.

How much data do I need for a UK trip?

Around 0.6 to 0.8 GB per day covers normal use — maps, transport apps, messaging, browsing, photos. A long weekend in London fits comfortably in 2 to 3 GB; a week lands near 5 GB. The UK's public Wi-Fi coverage in cafés, hotels, trains and stations absorbs a good share of heavier use.

Contactless transport apps and live train times are light. What is not light is streaming on a long rail journey — a two-hour train with video running will eat more than a full day of ordinary sightseeing.

Will I lose my own number if I use an eSIM in the UK?

No. The eSIM installs as an additional line, so your existing SIM and number stay active for calls and SMS at your operator's rates. You select the eSIM as your mobile data line and switch data roaming off on the home line, which prevents background apps from quietly using the expensive connection.

This also means you can test the arrangement cheaply. If your tariff turns out to include UK data after all, leave the eSIM dormant and use your home line as normal.

How does an eSIM compare with a UK pay-as-you-go SIM?

A British pay-as-you-go SIM gives you a UK number and often more data for the money, which matters if you are staying for weeks. The costs are practical: buying it in person, and taking your own SIM out unless your phone holds two, which takes your number offline for calls and SMS.

For a short visit, the convenience usually decides it. For a month-long stay, a UK SIM with a monthly bundle can work out cheaper, and having a British number is genuinely useful for bookings, deliveries and anything that rejects an international number. There is no identity registration requirement in the UK, so buying one is quick.

The middle ground most travellers end up on is keeping the home SIM live for calls and texts, and putting data on a plan bought in advance. That way nothing is removed, nothing is queued for, and the expensive part of roaming — data — is the part you have replaced.

Does the plan cover Ireland too?

No. A UK plan covers the United Kingdom — England, Scotland, Wales and Northern Ireland. The Republic of Ireland is a separate country and an EU member state, so it falls under your home tariff's EU roaming, which is included for European contracts.

That split matters for anyone crossing the land border on the island of Ireland, where your phone may switch networks without obvious warning. If you are travelling both sides, a European regional plan or careful attention to which line is handling data will save confusion.

See eSIM data plans for the United Kingdom