@Steve *******
good luck with what? I showed my UK license to the transport office in Chiang Mai and they gave me full car and bike licenses. I have a full license in Thailand. But for years before I used to IDP with the bike endorsement and my UK car license, it was fine.
And final thing, no, the authorities are NOT smarter than most people give credit, insurance companies are a different thing, they will find any excuse not to pay out