Yes, me. But I am bloody miles away.
However, there must be others!
Have a look around for wheels for all / bikes for all groups run in association with Cycling UK or Cycling Projects UK or FABB Scotland and ask about.
Some of their coaches will be Cycle Leader trained and may be interested.
They should all be listed on the Cycling UK website. https://cycling.org.uk/wheels-for-all
These sessions are an ideal and safe way for anyone to begin cycling, generally with excellent tuition from cyclists who often have strong links with the care sector, as they are geared toward full access, regardless of age or ability.
Not all will have a full on mtb trail leader on hand, but some will, as it is a wonderful place to work and tends to attract two wheel fanatics (I’m guilty, but then, who wants a real job)?
It is also a good way to get decent training without having to pay one to one mtb instructor prices.
Just to say, we had a young lad in a similar situation come to us through a day service. He couldn’t ride at all. We had him confident on two wheels in three sessions. That was six months ago, now he has started as a volunteer with us and has mastered skids, bunnyhops and last week, his first proper endo!
Good luck!