Hi Gary thanks for your reply.
The car went in originally for an external head gasket leak. The engine ran fine but I wanted to fix it before it gave way. I decided to go for a reconditioned head that was peended because two years ago I already had the head gasket replaced with a MLS gasket and skim. Because it failed so soon after I decided a head that was peened might be a good option. The garage replaced the head. When it was ready for collection the head gasket gave way again. The cylinder head was faulty, the peened area had sunk causing HGF. The garage then replaced the faulty cylinder head with new but has remained tappety. The garage then replaced the lifters but has still remained tappy. The poor garage have now said a conrod could be bent caused by last HGF. They say it will be fixed on their expense as the engine ran fine before head removal. Oil level and pressure all fine. Just hope the garage can claim expenses on the engineering firm that supplied the faulty head as I've no complaints with the garage concerned.
Sorry for such a long post.