Yeah, it was the door seals, three of them were leaking. Unfortunately I didn't know about this forum before I bought the car, I would have checked for common faults etc and found out about the leaks beforehand. The car had obviously leaked for some time as they were absolutely saturated and stinking once dry, so a new set is the only cure. Fixed my third gear whine using the shim method which is spot on, just need to
service her now, so looking into the best oil, plugs etc to get.