Wise is fastest . Rates real good too. Get a wise card , you can have a bhat account. You top up when rate is good , use like debit card in Thailand. ( still 220 bhat fee at atm mind )
Leave in Uk bank put in interest account t that will pay into your current account each month, get a wise card. Open a wise bhat account, Keep eye on exchange rate and move money when rates good. Ie was 46.9 in July. Bow 41. ?
it does seem to change from region to region, mine was in roi-et Isan . Seems there is certain criteria, which depending on where you live and if you use an agent , the criteria may be more relaxed !!!