After thinking about your post, you should not be getting pension upgrades if you are living in Thailand, let me explain my thoughts.
YOU, must tell DWP of any change of address in the UK or another other country, even if in hospital in the UK. If abroad, you get a life certificate, in the UK you do not.
In France, you will get the upgrades, same as the UK, but if you set foot into Thailand, your increases will stop, until you set foot into a reciprocal agreement country, again, so if your pension has been upgraded whilst in Thailand, you have been overpaid.
If it were that easy 'legally', we would all be doing it......๐
This is a print from DWP living abroad pamphlet..