KL Embassy did before covid, but now, I couldn't say, you would have to check, it was easy then from Hua Hin as there was an Air Asia flight to KL from HH airport, but covid put a stop to that ! I do remember to get a Tourist visa there you apply on day 1 but do not get the passport back with new visa until day 2.
Government pension where i paid serps all my working life frozen, the rises now are peanuts anyway thanks to the frozen tax free allowance, but Private pension and ISAs I have 2 as my wife has 1 all handled in the UK ! Anything else you would like to know ?
Well thats Thailand ! So go and ask Immigration, Im perplexed about the UKs open boarders and invasion ! but there is nothing I can do about it !! I prefer the way Thailand controls its legal immigration !