Can recommend BMTec indy garage close to Manchester City centre, (recently moved to M3 7AX, a much better location and better set up). Took my E39 520i 2002 for repair, engine running rough, turned out to be a simple spark plug change!! With hindsight could have done the job myself. Bloke there called Andy, very helpfull, no oversell and came across very knowledgable. This was my first use of an Indy garage and would definantely go back again e.g on next service etc.