I don’t think you have enough time to get anything translated to extend this current visa.

The Department of Consular Affairs out at changwattan has a translation service and they stamp it as authentic. If you get there early you can sometimes get it done the same day, or go get it the next day.

Not sure if immigration will accept that without verification from the British embassy and it takes 2 weeks to get an appointment there.

Other options will be a visa run to a nearby country and get a 30 day visa exempt on re entry.

How many more days do you need to get? Weeks? Months?

Just read again you had single entry

So you’re in Thailand on a multiple entry O visa right?

If it’s use before date is 27th may you can exit and re enter on it before the 27th and get another 90 days.

Was there in February and it was ok

The Thai consulate in Savanaket don’t ask for financial documents

One year multiple entry

they should give you the extension

Then you have no need to go in to the immigration office at Jomtien

Within 24 hours of arriving at Jomtien go to immigration and do the TM30 and the extension

Or just go to immigration in Bangkok and extend before you go.

Was there in February copies of all was accepted

I carried the originals just in case but wasn’t asked for them.

Do they have an office?