Hello. I am British and I arrived in Thailand last week with VOA from Cambodia. If I were to go to Laos and then fly back to Bangkok within the 30 days and not leave the airport but fly back home, would this be allowed please?
TLDR : Answer Summary
A British passport holder arriving in Thailand under the 30-day visa exemption can leave for Laos and return without issues, but upon leaving Thailand, the original entry stamp is canceled. Upon re-entering, a new 30-day visa exemption stamp will be issued. Ensure to exit the airport within 30 days to avoid overstaying.