Destination
UK eSIM: mobile data in London, on the Tube and in Scotland
How to get mobile data in the UK: coverage in London and on the Tube, Scotland and the hills, local SIM vs eSIM, Europe plans after Brexit and the Eurostar trip.
Plan for your trip: United Kingdom · Data for your trip — See plans →
The easiest way for a traveler to get mobile data in the UK is a travel eSIM installed at home, or a local prepaid SIM. In London and other big cities the network is dense; the tricky spots are the deep Tube tunnels and the Scottish mountains. One key detail since Brexit: the UK is not in the EU, so EU roaming rules don’t apply there.
How does mobile data work in London?
Mobile data in London covers virtually the whole city: the center, the residential neighborhoods and the Heathrow and Gatwick airports. The major UK carriers — EE, Vodafone, O2 and Three — run 4G and 5G networks, and a travel eSIM connects to one of them as a partner network. Which network and which generation you actually get depends on your plan and your phone model.
London mobile data is slowest where lots of people are online at once: King’s Cross and Waterloo stations, stadiums and big events in the center. That’s ordinary network congestion, not a problem with your eSIM profile. Cafés, museums and many train stations offer free Wi-Fi, often with a quick email sign-up.
Is there signal on the London Underground?
Many London Underground stations already have mobile coverage: according to TfL, as of June 2026 about 60% of below-ground stations are connected, the Elizabeth line is fully covered, and the whole network is due to be connected by the end of 2026. On some stretches, especially on the deep, older lines, the signal still drops. For a traveler, that means one simple rule: open everything you need for the journey before you go down.
- Plan your route above ground and save it as a screenshot or in the app’s offline mode.
- You can usually pay for the Tube and buses with a contactless card or your phone if your card supports it; check this before the trip.
- Messages that don’t go through in a tunnel will send automatically at the next station.
- Above-ground lines, buses and double-decker sightseeing tours keep their signal.
Coverage is being switched on section by section, so check the current list of stations and lines with signal on the Transport for London (TfL) website before your trip.
Where is coverage weaker in Scotland, Wales and rural England?
Outside the big cities, mobile data in the UK is patchy. In towns and along main roads the network works, but national parks, the coast and the mountains have long stretches with no signal. Scotland is where you’ll notice this most.
| Place | What to expect | What to do in advance |
|---|---|---|
| London, Manchester, Birmingham | Dense 4G, 5G in places | Nothing special beyond saving routes for the Tube |
| Edinburgh, Glasgow | Reliable coverage in the city | Download a map for day trips out of town |
| Highlands, Loch Ness, Glencoe | Signal drops on mountain roads and trails | Offline maps, meeting points, weather forecast |
| Isle of Skye, Mull, Orkney | Signal in villages, gaps between them | Ferry timetables and bookings as screenshots |
| Lake District, Snowdonia in Wales | Weak in valleys and on hiking routes | Tracks and area map offline |
| Cornwall and the coast | Fine in towns, patchy in coves and on trails | Save accommodation and taxi contacts in advance |
Local SIM or eSIM in the UK: which is better for travelers?
For data on a trip, an eSIM is easier; a local prepaid SIM is for when you need a UK number. Prepaid SIMs are sold in phone shops, supermarkets and airports, and there has traditionally been no mandatory ID registration for them, but store practices can change, so check before you go. A UK number is handy for longer stays and calling local numbers.
A travel eSIM sorts out mobile data without a trip to the shop. With MoreSim, the QR code arrives in the chat in about 30 seconds, you install the profile at home over Wi-Fi, and it works as a second line: your home SIM stays in the phone, and bank texts reach it as long as your carrier supports roaming. The plan starts counting on first connection in the destination, so installing it early is safe. MoreSim plans are mobile data only, with no phone number: you call over messaging apps, and the data and validity for the UK are on its catalog page.
| Option | Pros | Cons |
|---|---|---|
| Travel eSIM | Installed at home, works minutes after landing | Needs an eSIM-compatible phone |
| Local prepaid SIM | UK number, local rates | You have to find a shop and swap your SIM or use up a slot |
| Home carrier roaming | Nothing to set up | Terms and availability vary — check with your carrier |
Is the UK included in a Europe eSIM plan?
As of October 2026, the UK is included in the MoreSim Europe regional plan, but the EU “roam like at home” rule doesn’t apply there. That rule covers SIM cards from EU carriers inside the EU and EEA: according to the European Commission, some carriers include the UK voluntarily, but they aren’t obliged to. A local SIM from France or the Netherlands may work on completely different terms in London, so check with that carrier.
Country lists in regional plans change over time, so check for the UK on the plan’s details page in the catalog or in the @moresim_bot bot before every purchase. If it isn’t listed, add a separate UK plan as a second profile. Our guide to one eSIM for all of Europe explains how regional plans work.
Is there mobile data on the Eurostar from London to Paris and Brussels?
On the Eurostar you usually have data: there’s mobile coverage on the above-ground sections, and according to tunnel operator Getlink, the Channel Tunnel has had a 4G network since 2014. Whether your plan connects to it depends on its partner networks, so brief dropouts on the route are possible. At the border, your phone switches from a British network to a French or Belgian one automatically, as long as your plan works there; as of October 2026, all three countries are in the Europe plan.
- List every country on your route, including layovers where you leave the station.
- Check that all of them are on the regional plan’s country list.
- If one is missing, buy a separate plan for it and install it at home as a second eSIM.
- On the train, once you cross the border, pick the right profile for mobile data and turn on data roaming for it.
- If the network doesn’t show up within a couple of minutes, toggle airplane mode on and off.
How much data do I need for a trip to the UK?
How much data you need depends on your habits, not the country. Maps, messaging, search and ride-hailing use very little: a week of them typically fits into 3–5 GB. The bulk goes on video, video calls, automatic photo uploads and video-heavy social media, so a trip with daily stories and livestreams uses far more than a week of museums and walks.
- Turn off automatic app updates and cloud photo uploads over mobile data.
- Download offline maps of London and Scotland before you leave.
- Be careful sharing data with a laptop: system updates eat through data without you noticing.
- Check your remaining data in your account or in the bot’s app, and if you run low, top up without a new eSIM with “Top up data” on the eSIM card, if top-ups are available for that plan.
For a scenario-by-scenario breakdown, see our guide on how much data you need for a trip. If your eSIM doesn’t connect, MoreSim support is reachable via /support in the bot, a ticket in your account and email.
FAQ
Does mobile data work on the London Underground?
At many stations, yes: according to TfL, as of June 2026 about 60% of below-ground stations have coverage, and the whole network is due to be connected by the end of 2026. On some stretches the signal still drops, especially on the deep, older lines. Save your route and tickets offline before you head down; messages that don’t go through in a tunnel will send at the next station.
Does EU roaming apply in the UK?
No. The UK has left the European Union, so the EU “roam like at home” rule doesn’t cover it: that rule only applies to SIM cards from EU carriers used inside the EU and EEA. According to the European Commission, some carriers include the UK voluntarily, but it isn’t an obligation. If your route includes London and EU countries, check that the UK is on your plan’s country list.
Is the UK included in the MoreSim Europe plan?
As of October 2026, yes: the United Kingdom is on the Europe regional plan’s country list, along with France, Belgium and the Netherlands. Lists change over time, so check for the UK in the plan details on the catalog page or in the @moresim_bot bot before you buy. If it isn’t there, add a separate UK plan as a second eSIM profile.
Do I need a passport to buy a SIM card in the UK?
Prepaid SIM cards in the UK have traditionally been sold without mandatory ID registration, in supermarkets, phone shops and airports. Rules and store practices can change, so check before your trip. If you don’t need a UK number and data is enough, you can install a travel eSIM at home and skip the shop altogether.
Is there mobile signal in the Scottish Highlands?
In Edinburgh, Glasgow and other big Scottish cities, mobile data works fine. In the Highlands, on the Isle of Skye and the Isle of Mull, and along mountain roads, the signal is weak in places or disappears for long stretches. Download offline maps and ferry timetables in advance, and don’t count on coverage on trails and mountain passes.
Does mobile data work on the Eurostar under the Channel?
Usually, yes: the above-ground sections of the London–Paris and London–Brussels routes have mobile coverage, and according to Getlink, the Channel Tunnel has had a 4G network since 2014. Whether your plan connects to it depends on its partner networks, so brief dropouts are possible. If you have a single-country plan, install a second profile for your destination in advance or pick a regional plan that covers both countries.