Thanks Mike, I must admit I did take a look after my post and saw there were issues in the states. Iam surprised not to have heard too much of the issue over here. I've got the cover off and scraped the old gasket off, Got some minor scratches, Will run a scotchbrite over the surfaces, run a very thin layer or high temp RTV on the mating services and bolt it together. I think torque is 7.5ft/Ibs?
A new gasket is £17!!!