I am about to get a load of dox Legalised against a trip to Thailand some time in the future, and so I am very interested to know if FCO have stopped doing this.
Why not give the Brit Embassy in BKK a call and see if they will do it - they will Legalised other documents (Passport, UK Marriage Certs, UK Driving Licence etc) but don't know about Degree Certs unless they have an independent way of validating them as genuine.
I am concerned about "it’s local Amphor for name change and change I’d card" as my wife's Thai & UK Passport are in her maiden name (as is her Thai ID card) and I am 100% sure she does not want to change them. Can the KR22 not be issued in her maiden name?