hi
yes its all sorted now, thanks for clearing that up T16. everything is fine now, so A/C systems must have some sort of safety device in the event of over charging.
what got me though was the fact that the A/C should never have been touched it was only a intermediate service I had, but I have used this garage since ive been driving (2002) so they probably did it through my loyalty to them any way pretty good ending no big bill which I feared.
cheers guys