Last trip we bought UK tickets from
attractiontickets.com. They are totally legit and worked for us just as any other ticket through WDW or a broker (like BW ticketing,
UT, etc) has in the past. Don’t need to be a UK resident.
But… they only offer 7 or 14 day tickets and we used a payment method with no extra charge for non-USD transaction.
Worked out very good for our Dec ‘23 trip because the 5 day hopper we wanted costed $802, and we ended up adding 2 days to our trip and getting the UK 7 day hopper plus for $645, that included magicbands and memory maker photos.
(Currently USD is doing against the pound - $1.26 to £1, but always check because that could change the math/value)
Our next trip is only 4 days so UK tickets weren’t a good fit.