HI
It is diffinatly the driver side / off side.
It appears to be leaking under pressure, you leav the car to cool and nothing leaks, you got for drive and get it warm, after it has been standing still a little while, you get a puddle under it.
Which would support it being collant, and by the position of the leak, i'm thinking worst case it could be knackered water pump bearings even though they havent been screaming.
Since it may be water pump bearings, it staying on the driveway as the last thing i want to do is strip the timing beld when the pump finally ceases up.
Without getting the bottom pan off i can't see whats going on. Top looks dry and nothing leaking, again water pump will be nearer the bottom ot the engine.
Thanks for the help guys. If anyone know different to me then please post, cos the only think that i know is that i know nothing.