It's safer to do a Land BORDER BOUNCE vs flying into Thailand in obtaining a New Visa Exempt Entry stamp of 30 days.
You did not say what your passport nation is... And I assume that it is the UK.
You also did not say what your recent history of staying in Thailand is...in 2022- 23.
AND you should have applied for the METV multiple entry tourist visa in your home country vs the SETV single entry tourist visa. With planning the METV multiple entry tourist visa can get you up to 9 months stay in Thailand with a few simple land border bounces and re-enter Thailand.
Good Luck with your plan for staying longer in Thailand.
For Future reference... read this post about getting the METV multiple entry tourist visa.
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