Planning a trip to Europe and flying to London Luton and wondering what is the best way to stay connected? Don't ruin your trip to London by high roaming charges or slow overseas data roaming! Get yourself a UK sim card and get connected to 5G in London. This is a complete guide for buying a sim card at London Luton Airport with where to buy a sim card, up to date prices as per May 2022, my recommendation and even information about international and e-sim cards for the UK.