If you're planning a trip to London, Edinburgh, or the Highlands, there's a question you should answer before packing your bags: how will you get internet in the UK without getting a nasty surprise on your bill? And I'm telling you this from my own experience and that of many clients: what worked in 2019 no longer applies. Brexit changed the rules, and many people are still crossing the channel with the wrong idea in their heads. In this guide, I compare all the real options—with their fine print, prices, and drawbacks—so you can choose the one that truly fits your trip.
Brexit changed the rules: the UK is no longer "like home"
No, free roaming is not guaranteed in the UK. Since January 1, 2021, the country is outside the European roaming regulations, so no Spanish operator is obliged to give you data "like at home." Some maintain it for commercial reasons, others charge separately, and others treat it directly as the rest of the world.
This is the point that generates the most confusion and causes the most expensive bills. The European Roam Like At Home regulation—the one that lets you use your gigabytes in Lisbon or Rome without paying extra—applies to the EU and the European Economic Area. The UK ceased to be part of that club, and although Brussels extended free intra-community roaming until 2032, that extension does not reach London or Edinburgh.
What remains is a landscape without common rules: each Spanish company freely decides whether to include the UK in the European zone, place it in a surcharge zone, or charge for it as if you were in Japan. And these decisions change over time: some operators kept it free for years and then removed it, while others cover it only with temporary promotions that expire.
The practical consequence is twofold. You cannot rely on what a friend told you two summers ago, and you need to check your specific contract, because within the same operator, there are tariffs that include the UK and others that do not. I detailed the full breakdown in this guide on whether there is roaming in the UK.
What each Spanish operator does in 2026
Now it's time to roll up our sleeves. I have summarized the situation of the main Spanish companies, but with a huge warning upfront: these conditions change every few months and depend on your specific tariff. The table serves to tell you what to ask, not to replace consulting your operator.
| Spanish Operator | How the UK is treated | What it means for you |
|---|---|---|
| Movistar | Zone 1 for most tariffs, with a fair usage limit | You use your gigabytes, but if you exceed the limit, the surcharge can reach €0.13/MB (about €133 per GB) |
| Vodafone | Surcharge zone, covered by temporary promotions | The last surcharge-free promotion ran until June 30, 2026. Check if it's still active |
| Orange | Left Zone 1 upon Brexit completion | Surcharge unless a separate bonus is contracted |
| Yoigo / MásMóvil | "Rest of the World" Zone since March 2025 | The most expensive case: calls from €2/min plus setup fee |
| DIGI | Zone 1, same as the EU | No surcharge on your national tariff, within fair usage |
The range goes from "you pay nothing" to "you go broke watching videos on the train." Also, be careful with fair usage limits: even if your operator includes the UK, there is almost always a gigabyte cap—often lower than your national allowance—and after that, the per-megabyte meter starts. I compared the general figures in how much international roaming costs.
A rule I always apply before flying: if my operator doesn't confirm in writing—in the app or chat—that the UK is included without surcharge and with how many gigabytes, I assume it's not. And I act accordingly.
Free Wi-Fi: hotels, pubs, and transport
The UK is one of the countries in the world where it's easiest to connect to a free network. Pubs with open Wi-Fi are everywhere, almost all cafes offer it, London's national museums also do, and there's Wi-Fi in tube stations. Hotels and Airbnbs practically always include it. So the temptation to travel "unprepared" is real.
The problem is that this strategy breaks down precisely when you need it most. Think of critical moments: you get off the plane at Heathrow and need to confirm your transfer; you arrive by train in Edinburgh with your suitcase and want to open a map; the Uber driver calls you and you have no signal; the hotel check-in sends you a code via SMS. None of these moments happen while sitting in a pub with a password.
Add two drawbacks. Security: open networks at airports and cafes are not the place to access your bank; if you use public Wi-Fi, use a VPN. And friction: many British captive portals require registration with an email and sometimes an SMS verification—and if you don't have data, you won't receive the SMS. Wi-Fi is a good complement for downloading series at the hotel, but a bad main plan.
The local British SIM: EE, VodafoneThree, and O2
The classic option: you land, find a store, and buy a British prepaid SIM. The market has become quite concentrated: today the big players are EE (from the BT group, traditionally the best coverage in the country), VodafoneThree (born from the merger of Vodafone UK and Three in 2025), and O2 (Virgin Media). Below them operate virtual operators like Giffgaff, Lebara, or Lycamobile, which are usually cheaper.
The advantages are obvious: very competitive local prices—there are prepaid plans with tens of gigabytes for the equivalent of £10-20—a British number for local calls, and native coverage without relying on roaming agreements. If you're going to spend weeks in the country or need a local number for various arrangements, this is a solid option.
Now for the drawbacks, and there are some. You lose your Spanish number while the SIM is inserted, unless you have a dual-SIM phone. You have to spend travel time looking for a store and activating the line—and often the online activation process requires a British address. The "unlimited" plans you see on signs are usually contract plans with a minimum term, not prepaid. And the paperwork can eat up half your morning on Oxford Street. I compared it in detail in eSIM vs local SIM.
The eSIM: the option I use
An eSIM is a digital SIM card that's already integrated into your mobile: no plastic, no tray, no clip. You buy a data plan online, receive a QR code or installation link, activate it, and you're good to go. If you've never used one, I explain it from scratch in what an eSIM is.
For a trip to the UK, this is the solution I almost always recommend, and for very specific reasons:
- It's installed from home. You configure it with your Wi-Fi in Spain, and as soon as you land, you activate the data. Zero time wasted.
- You keep your Spanish number. The eSIM handles data; your physical SIM still receives calls and SMS from your bank.
- Fixed price. You pay upfront for the gigabytes you've chosen. There's no surprise bill.
- It uses local networks. You connect to the British network just the same, with the same coverage as a local SIM.
- Changes country automatically. If you're going to London + Dublin or London + Paris, there are regional plans that cover several destinations.
The downside is honest: you need a compatible phone—all iPhones from XR onwards and most mid-range and high-end Android phones from recent years are—and you don't get a British number for traditional calls, although with WhatsApp and data calls, that rarely matters. If you want the specific plans for the country, they are in the UK eSIM guide.
Comparison of the four options
With everything on the table, here's the picture. I've scored them with a Spanish tourist in mind who spends between 4 and 10 days in the country, moves around cities and takes some day trips, and wants their phone working without too much thought.
| Option | Typical Cost (1 week) | Risk of Surprise | Effort | Ideal for… |
|---|---|---|---|---|
| Roaming from your operator | From €0 to over €100 depending on company and usage | High (depends on zones and fair usage) | None, if included | Those who have UK confirmed in Zone 1 |
| Free Wi-Fi only | €0 | Medium (you're stuck without a map) | High: constantly searching for a network | Very short trips with no displacements |
| Local British SIM | £10-20 | Low | High: store, activation, changing SIM | Long stays or those needing a local number |
| Travel eSIM | Fixed price depending on gigabytes | None: paid upfront | Minimal: installed from home | Most tourists |
What truly matters is not the absolute price—the differences are just a few euros—but the risk and the time. Roaming can be free or cost you a dinner for four, and you won't know until the bill arrives. A local SIM is cheap but costs you travel hours. An eSIM combines a known upfront price and zero on-site management. The direct comparison is in eSIM vs. roaming.
Coverage in London: street, tube, and Elizabeth line
On the surface, London is one of Europe's best-connected cities: 4G everywhere and 5G widely deployed in the center and most neighborhoods. With any of the four British networks, you'll be more than covered walking through Westminster, Camden, or Shoreditch.
The interesting case is the Underground, and here there's good news that many people still don't know. Transport for London and Boldyn Networks are deploying 4G and 5G coverage across the entire Tube network, with an investment of around £1 billion and a 20-year concession. By mid-2026, around 60% of stations already have signal, including tunnel sections on lines like the Jubilee, Central, Northern, and Metropolitan, and the plan is to complete the entire network by the end of 2026. EE, O2, and VodafoneThree have wholesale agreements with this infrastructure, so it doesn't matter which network you connect to.
Translated to your trip: you'll still lose signal in some tunnels, but less and less, and you'll almost always have data on platforms and in concourses. The Elizabeth line and DLR are also part of the rollout. My practical advice remains the same: download an offline map of London on Google Maps and save your route before heading to the platform. It's a minute that saves you trouble.
Edinburgh, rural Scotland and the Highlands
Edinburgh, Glasgow, and Scottish cities work just as well as London: 4G and 5G without problems, so if your trip stays in the old town, Arthur's Seat, and some short excursions, you have nothing to worry about.
The story changes as soon as you leave the main road. Scotland has the lowest geographical 4G coverage in the entire UK, according to Ofcom reports, and the reason is purely physical: mountains, deep valleys, dispersed population, and islands. If you're going to drive the North Coast 500, take the Skye route, go to Glencoe, or to the western islands, you will find long stretches without signal with any operator. There are advances—the Shared Rural Network program has activated dozens of new antennas in areas like Arran, Islay, Jura, and the Ardnamurchan peninsula—but coverage gaps are still part of the landscape.
What I do when driving through the Highlands:
- I download offline maps of all of Scotland, not just the area for the day.
- I save reservations, tickets, and addresses on my phone, in PDF or as a screenshot.
- I inform someone of my planned route if I'm going to remote areas.
- I remember that emergency calls (999 or 112) work with any available network, even if your operator doesn't have signal there.
How much data do you really need?
This is the question I get asked the most, and almost everyone overbuys gigabytes they won't use. An average tourist consumes much less than they think, because they sleep in a hotel with Wi-Fi and spend a good part of the day walking or inside museums.
| Traveler Profile | Typical Usage | Data for 7 days |
|---|---|---|
| Basic | Maps, WhatsApp, email, some searches | 1-3 GB |
| Standard | Above + social media, photos, Spotify occasionally | 5-7 GB |
| Intensive | Daily stories, videos, maps all day, tethering to laptop | 10-20 GB |
| Remote work | Video calls, cloud, sharing connection | 20 GB or unlimited |
To gauge: browsing with Google Maps uses barely 5 MB every 15 minutes; WhatsApp with text and photos, a few hundred megabytes a week; but watching high-definition video eats up around 1 GB per hour. That is, video is the only thing that significantly increases data usage. If you commit to watching series only with hotel Wi-Fi, 5 GB will be more than enough for a whole week.
My honest recommendation: estimate your profile, add a small buffer, and don't buy the giant plan "just in case." If you run short, you can always top up in two minutes from your phone.
How to get everything ready before flying
All of the above can be summarized in a twenty-minute routine I follow the night before any trip to the UK. Here it is as a checklist:
- Check your tariff. Go into your operator's app and literally search for "United Kingdom" in the roaming conditions. If it doesn't appear in the European zone, assume a surcharge.
- Deactivate roaming data on your Spanish line. This is the switch that prevents 90% of dramatic bills.
- Install the eSIM from home, using Wi-Fi. Scan the QR, label it as "United Kingdom," and leave it off until you land.
- Configure the data line. In the settings, leave your Spanish SIM for calls and SMS, and the eSIM as the data line. This way you still receive bank SMS messages.
- Download offline maps of London, Edinburgh, and any rural area you plan to visit.
- Save important documents locally: tickets, reservations, travel insurance.
With that done, landing is boring in the best way: you turn on your phone, activate the eSIM data, it connects to the British network in less than a minute, and you're already calling for transport to the hotel while everyone else is still looking for airport Wi-Fi. Boring is exactly what you want in your first two hours in a new country.
Frequently Asked Questions
Is there free roaming in the UK after Brexit?
Not guaranteed. Since 2021, the UK is outside the European roaming regulations, so each Spanish operator decides. Movistar and DIGI usually include it in their European zone; Vodafone covers it with temporary promotions; Orange removed it from Zone 1 and Yoigo charges it as rest of the world.
How much can it cost me to go over my data limit in the UK?
Much more than you imagine. Some operators apply up to €0.13 per MB outside the fair use limit, which is equivalent to about €133 per gigabyte. Watching a couple of videos on the train can result in a three-figure bill.
Does my mobile work on the London Underground?
Increasingly, but not yet across the entire network. By mid-2026, around 60% of stations have 4G and 5G coverage, and the TfL and Boldyn rollout should be completed by the end of 2026.
Is there coverage in the Scottish Highlands?
Patchy. Scotland has the lowest 4G geographical coverage in the UK: mountains, valleys, and islands leave stretches without signal on routes like the North Coast 500 or Skye. Always carry offline maps.
Is my mobile compatible with eSIM?
Probably yes. All iPhones from XR onwards, Google Pixels from 3 onwards, and most recent Samsung Galaxy S and mid-to-high-end Android phones are. Check by dialling *#06#: if an EID code appears in addition to the IMEI, your phone supports eSIM.
Do I need a British number to get around the country?
Almost never. Hotel bookings, Uber, restaurants, and trains work with data and your usual number. A local number only makes sense if you are going to handle administrative tasks or stay in the country for several months.
Conclusion
To summarise what matters: after Brexit, the UK no longer has guaranteed free roaming, and what you pay depends on a lottery of tariff zones that changes every season. Pub and hotel Wi-Fi fails just when you need it. A local SIM is cheap and takes half a morning. And an eSIM is the only option with a fixed price, British network coverage, and zero on-the-ground hassle.
If you're going to London, Edinburgh, or to explore the Highlands, sort it out before you leave home: install your eSIM for the UK, activate it when you land, and dedicate your time to what you went there to do. See you on the other side of the channel.
