I have just come across this topic..
Anyone in the Manchester, Bolton, Wigan area I would recommend http://jagman.co.uk/...used them regularly over the past 6 years with no complaints.
Their address.....Jagman, Platt Street, Platt Bridge WN2 5DA...(Dave)
I also use a Jaguar trained mobile mechanic named Ian Caton...Cato Auto's Tel No 07709 345351
Ian is an excellent mechanic, does not overcharge. I have been using him over the past 8 years on all family cars....no job to large!!!
He is based in Leigh area.......the down side is that he is always very busy and not always able to do urgent work.