Highland Aviation run one, Stuart normally does it, I believe they are pretty popular with folk visiting with the family and doing some a bit more challanging than touring.
And I also believe as well Graeme Dawson does one in Carlise unfortunately I haven't spoken to him for a bit so can't remember the school he is at.
Both are good instructors in my opinion
The courses don't give you any rating's as such they are just advanced training and won't give you any rights in areas that require a "mountain flying" ticket.