As above, my friends escort is leaking oil somewhere, hard to see where exactly as haven't had a good nose underneath, i've already changed the rocker cover gasket as that was leaking but still has a problem.

Im thinking its probably the sump gasket, is this a common thing to go?
I have changed the sump plug and is still leaking, cheers for any help Matt.

 

Have a look underneath if there is oil on the sides of the sump then it might be that mine whent on my efi. sump gaskets are only about £8-£10 from the motor factors.