LPG specialist in / around Manchester

As per title really, the LPG kit on my 2001 (P38) RR needs looking at / servicing. Any advice for a good, reliable garage in or around Manchester who could take a look at it?

Where abouts in Manchester are you?

Urmston, but don't mind travelling a bit for a good garage.

Hi Paul , theres a good place at Ardwick green next to the appollo theartre , he's called sam , not a rip off place they do lots of other stuff too . always did a good service on my v8 4.6 thor , you can wait while they do the job too . the company is called Panache tel no 0161 273 3103 ,, regards Mozz