Just as an update - and as B&C suspected when I met with them at Goodwood - there is a leak on the pipework connecting the oil cooler to the engine.
In some ways I'm pleased it's not the sump as it would have meant I had given it an almighty clout and not have felt it!
Not sure when I will get the car back. Soon I hope as it's the Season.
Do you think it was caused by something catching it from underneath or a faulty hose clip ?
