What steps should I take if I lost my passport and need to extend my visa in Thailand as a UK citizen?

If you have lost your passport while in Thailand and need to extend your visa, the first step is to obtain a temporary travel document or an emergency travel document from the UK Embassy. You can do this by visiting the embassy located on Wireless Road in Bangkok. It is also advised to report the loss to the local police station, as this might help avoid complications during your stay regarding immigration status. Additionally, ensure that you are proactive about managing your visa situation to avoid overstaying.