OK, I shall try that in December when I do my Extension, but shall have the Bank statements and books ready.
On the Wise FAQ site, Sending GBP to counties outside of UK, it says that you CAN opt for a SWIFT, but it will take longer and cost more. However, in the list of countries Where you can send GBP, Thailand is not included. And I thought I knew all about Wise.
Never mind, as long as my monthly transfer goes through as an FTT, and my IO accepts it, I don't really give a monkey's.