LPG specialists?

Hi does anyone know of any lpg specialists near Milton keynes. I know of one who i have used in the past but was not keen on there service.
My system is stuttering under hard acceleration, so want to get it all refreshed and checked up

Have you done a search for installers etc for your particular system. Mine played up recently but my local specialist could'nt talk to it as he never had any dealing with that type. It may be that you have to use the guy you don't like or drive some way to get it sorted. I ended up going to Plymouth where the system was fitted (100miles each way) to get it sorted. Was well worth the trip though, running sweet as a nut now.