Thanks for the replies. Over the last few days I have done long and short trips with the air con off/ and on. I have just done a round trip of 160 miles with air con on, no leaks. Before that 60 miles with air con off, no leaks. So I guess the juries out out on this one. Off to France for 10 days ne...

Sorry, I did not make myself clear I suspect it is condensate from the air con but I did not make that obvious. I'll run the car today without air con on and see what happens.

I have noticed in the last few days a water/substance leak which seems to be coming from under the centre of the car behind the engine. It seems to be slightly oily. I suspect air con, hopefully I am right. Can anyone reassure me?