Thanks for the feed back Gent's that's very helpful, the mechanic at Beamish Morgan say's it's nothing to worry about, I've had it serviced when I bought it last September, now I've done circa 500miles, and as the car was parked for 4-years by the previous owner I might give it another oil and filter change.
6-litres of Castrol 10-40 semi synthetic should do the job..
Cheers, Parna