Hello again. The head hasn't been skimmed. The timing chain marks line up. Originally the sump was filling up with diesel and we found a crack in one of the injector holes. Also, we had some work done at a garage but had a disagreement with the man over his extremely inflated price. Funnily enough, a little while later one of the cam bolts worked loose, came out and cracked the front of the head, dropped down and broke the oil pump chain! We heard this happen and literally drove round the corner and parked it on our drive. We left the car standing for a while (months) and it started up and there was no unusual noises. Thanks for your help so far, it's driving us both mad but unfortunately we cannot afford to put it into landrover.