Need heads skimmed -anywhere local?

Morning all the saga so far few months back cooked the engine and when I stopped her she sounded like a bucket of nails I assumed she was dead so was about to order recon engine but needed to move the rangie a few yard to do the work and being a lazy barsteward thought maybe she would run. Charged her up turned the key and she started with a small miss on maybe one or two pots and was quiet and really quite smooth so head gasket s for sure but will need to get heads skimmed so the question is does anyone know of a good firm to do same near Heathrow as ever any help well received