Discovered today i have a coolant leak when my a/c is on but only seems to be when the car is stationary.

Under normal driving, it seems to be fine.

I don't have the facilities to check underneath car myself but looks like it may be near the rear of engine bay.

Any ideas folks?

It's condensation from the aircon, silly.

^^^ Yup! What he said... Nothing to worry about mate. 

If it really is a coolant leak you will have had to top it up surely!...AC condensation is the answer

Fair enough, not familiar with a/c systems so thought i'd ask the question. Cheers folks

I take it the "silly" comment was made in jest so i'll treat it as that sepulchrave.