United Kingdom · Connectivity · 2026/27

Staying online in Leeds

Post-Brexit, EU phones now roam in the UK at non-EU rates — usually 25-50p/min and £1-3/day data. UK SIMs roam back into the EU under operator-specific 'fair use' caps. Coverage is excellent in cities and patchy in rural Scotland / Wales / Cornwall. London Underground rolled out 4G across the network in 2024 — finally.

The eSIM route (recommended for most visitors)

Best provider: Airalo (EE backbone) or Holafly.
Typical pricing: Airalo: $5 for 1GB / 7 days, $11 for 5GB / 30 days. Holafly: $19 unlimited / 5 days.

EE has the best UK-wide coverage. Three has tighter coverage but cheap data plans. O2 / Vodafone are middle of the pack.

The local SIM route

Operators worth using: EE, O2, Three, Vodafone UK + MVNOs (Giffgaff, Smarty, VOXI).
Where to buy: Giffgaff / Smarty SIMs are mailed free or available at supermarkets. £10 buys 20-50 GB on most MVNOs. Walk into any EE / Three shop with ID.
Registration: No legal ID requirement on prepaid SIMs (unlike most of Europe). Online activation is instant.

Public WiFi

Cafés, pubs, and hotels: yes, reliable. London Underground 4G is on every line in 2024. National Rail trains have onboard WiFi (often paid). Beware free public WiFi at major rail stations — some are honeypots; VPN.

Network speeds you'll actually see

5G in all major cities + most towns. 4G universal except in remote Scottish Highlands / Welsh valleys. Real-world speeds: 100-500 Mbps on 5G; 30-100 Mbps on 4G.

Local apps to install before you arrive

Citymapper — best transit app for any UK city
Trainline — national rail bookings
Uber / Bolt / FREENOW (FREENOW = black cabs) for taxis
Deliveroo / Just Eat / Uber Eats for food
Monzo / Revolut popular among locals; foreign cards work everywhere anyway

Last reviewed 10 May 2026. Roaming policies and eSIM pricing shift; check provider sites for current rates.