Can you arrive on a visa exempt, at Don Muang airport.
I intend leaving Thailand after 90 days to a neighbouring country, and return for another couple of months.
TLDR : Answer Summary
The discussion revolves around the possibility of entering Thailand on a visa exemption via Don Muang Airport and the requirements for staying in Thailand for an extended period. While several comments affirm that entry as a British citizen on a visa-exempt basis is allowable, there are clarifications made that a 90-day stay cannot be solely achieved through visa exemption. It is explained that the typical visa exempt entry allows for a stay of up to 30 days, which can be extended by another 30 days. For longer stays, individuals need a tourist visa (typically single-entry for 60 days) followed by a 30-day extension before re-entering Thailand on another visa-exempt basis.