Avoid high roaming charges when traveling to Europe! Are you flying to London for your trip to the United Kingdom? You can easily buy a UK sim card on arrival at London Heathrow Airport. Local prepaid sim cards are one of the cheapest and best ways to stay connected when traveling abroad and it doesn't cost as much as you may think.

In this complete guide for buying a UK sim card at London Heathrow Airport you can find where to buy a sim card, up to date prices as per June 2023, my recommendation and also info about international and e-sim cards for the UK.