I think should be ok but wouldn’t mind having my mind put at ease
Went to Thailand twice towards the end of last year on a British passport using the (what was) 60 day visa free entry, both trips were roughly 50 days each. Am going again for Songkran, this time for 3 weeks
Is there any chance they might refuse me entry? I have heard it all depends on the immigration officer you get on the day
TLDR : Answer Summary
The chances of being refused entry into Thailand on a British passport after multiple visa-free visits are low, as long as you have the appropriate documentation. Visitors are advised to carry proof of funds, onward travel, and accommodation to ease any potential concerns from immigration officers. Experiences from others indicate that entry is typically granted with these proofs, and warnings are given before any punitive measures are taken.