What are the requirements and processes for extending a 60-day visa exempt stamp in Thailand?

Travelers arriving in Bangkok from the UK can obtain a 60-day visa exempt stamp, which can be extended for an additional 30 days at local immigration offices like Jomtien. It's important to have a return flight ticket ready, as some airlines may require it for boarding. Extensions should be applied for within the last 7 days of the initial 60-day period, with the fee being around 1900 baht. Additionally, travelers should verify their travel insurance policies in relation to trip duration limits.