My 10 year old (UK citizen) has never done a 90-day and it's never been an issue when I've extended his stay. Maybe we've just been lucky.

Although Thailand does not require 6 months validity as long as the passport is valid for the duration of stay, most airlines don't seem to accept this over an abundance of caution. I have been in this situation although over a land border and although the UK Embassy told me I needed 6 months, they were wrong and I was admitted. Your situation is tricky as it may be more difficult to convince the airline check-in. A letter from someone in authority in Thailand may help. Good luck.

@Uday *******

Which office did you do your TM30 at? I'd try your nearest office first.

You use the office where you/they live (where their TM30 is filed). After the first in-person 90 day has been done, future ones can be done online.

@John ******

Lowest firm of wit

They moved from soi 13 to Rama 9 - The Shoppes at Belle Grand Rama 9, Huai Khwang

@Ian *********

The UK Embassy in Thailand do not legalise documents - it is done by the Legalisation Office in Milton Keynes - but they do certify passports. Appointments are made online.

@George ******

Me neither. But Labour probably don't want to make Reform voters even angrier!

Won't be happening unfortunately. Making it easier for foreigners to enter the UK is not a vote winner.

Yes it's true. However if your kids plan to stay in Thailand long term and be educated here, they should stay legal and get proper visas and extensions.