What visa options are available for UK passport holders looking to live and work remotely in Thailand?

Education visa . That's your best bet .. you get the full year . Forget anything else . Unless your 50 yrs + old ..45k baht I think .

Wait a month or 2, and see if new visa’s will be avaiable.

the alternative can be one of the five LTR visa categories

How old are you if over 50 you have more choice

Make sure you understand what it takes to get a work permit even if your visa says you can work.

ltr.boi.go.th - there is a category of Long Term Resident Visa (10 years) designed for you - and a huge benefit is it won’t tax you on foreign sourced income

There is a new digital nomad visa coming, details to be confirmed. Which is restricted I think to 180 days per tax year. The other visa will be one of the ltr visas. With postgraduate qualifications, you need to show average income for past 2 years of at least $40k, work experience in your field for 5 of past 10 years, your employer has to have revenue of at least $150m pa. Ltr creates the risk of permanent establishment establishment for the employer, ie they are liable Thai corporation tax, depending on your role. If you are a freelancer, you can find a Thai agency offering employer of record: essentially for a cut of your salary, they will put you on the books as an employee. I'm not sure that is entirely legitimate, and is exploiting a loophole that is at risk of being closed. Important you get the agreement if your future employer about where you work because of the risk of PE anywhere, which depends on UK tax treaties on how it is defined.

Look into the DTV.

Soon Thailand will be looking to tax you on any income earned outside of Thailand as well depending which Visa you are on so, something to keep in mind moving forwards.

(I am not sure how this is going to work yet, or if it will be applied to the Digital Nomad Visa, I suspect it will be)

Education Visa otherwise that's it really.

A digital nomad visa is in the works and may be announced later this month but, that requires 10,000 in the bank basically before they'll look at your application.