Range rover p38 specialist in West Midlands?

Hi guys, my Range Rover 4.0 is still playing games with me, one minute it's fixed the next it's broke. Beat the record for the longest I have ever seen it running of 1 hour 20 minutes and then it only cut out due to no fuel. Thought mint fixed book it in for MOT, then next day thought I would drive it down the road and back as it was only idling the day before, and nothing cut out and was broke again. My mates coming to put on his Snap On scanner tomorrow hopefully but not sure he will find anything. So the next plan is going to be a Rangerover specialist, as obviously dealers are a bit expensive. So I live in Walsall, so can anyone reccomend a decent specialist that can actually diagnose the fault with my Rangie that will actually fix it, if my mate doesn't come up trumps. I just want to know whats up with the bloody thing!!!!!!!!!!!!!!


Thanks