For those UK pensioners who have been here for several years, it may be worth investigating moving to a country where the increases are paid and only visiting Thailand for holidays. If you moved to one of these, my understanding is that after six months you will get all the frozen increases added to your pension. If you subsequently come to realise that, actually, you prefer to live full time in Thailand, then your pension would then again become frozen, but at the new level. Might be a considerable uplift for some.
I would not, of course, advocate moving "permanently" to the Phillipines (or back to UK, or elsewhere) and discovering after seven months it is not for you so you move back to Thailand.
PH