What are the best options for a UK passport holder to stay in Thailand for about 60 days?

For a UK passport holder traveling from Langkawi to Koh Lipe and planning to stay for about 60 days, there are two main options: you can either apply for a tourist visa before your arrival for a 60-day stay or enter Thailand without a visa which grants you a 45-day visa exemption, followed by a possible 30-day extension at a local immigration office.