Tim Spalding in the Midlands does meniscus transplants and has an NHS practice - however, whether he does the transplants on the NHS, I don't know. I think someone here (mrpenguin maybe?) had a meniscus transplant and MACI done by him last year but I have an inkling it was done privately. The NHS isn't too good at paying for 'experimental' procedures (that said, private HC companies are pretty good at digging their heels in too).
Look at the NICE guidelines website - has a decent search engine - and perhaps contact Mr Spalding's secretary