I believe some one else enquired about it and was told they had to re do there visa since it’s MOFA visa not issued in Thailand. ( I don’t know how true this is) and I hope it’s not accurate.
But I was you I would reach out to london embassy and explain your situation.
Other people may disagree with my next statement, but you could also try enter Thailand on your new passport with a photo copy of your old passport and your visa , best case they stamp your DTV, second best case they give you a 60 day exemption. Worst case they send you back to where you came from.