@Paul ******
go to thai embassy website in UK before you leave , and apply for 90 days retirement visa Non O and if over 50 only, when you arrive in thailand you got one month to sort a thai bank account and then leave 400k or 800k baht in there for 2 months, you then apply for extension of retirement visa, giving you longer stay, you also need health insurance and various medicals some testing for STD;s good luck