After my Vecci Estate had been in with Vaux for two!!! weeks for a coolant leak I thought they would get it sussed.

Yesterday drove to Portsmouth from devon, parked up and small puddle started to form under the car.
This morning I have just driven it about 100m up the drive and its left a trail from start to finish, but no puddle at the start (Can't tell on the end as its on grass)

It looks / smells like water but I can't be sure. The coolant tank is still full though.

I do drive with the aircon on 24/7 so I thought this may have been it in Portsmouth, however I don't really know how it all works, and should it have dropped fluid from first thing?

Any help appreciated so I can call Vaux if needs be!!