New Gasket fitted, everthing fine as far as that does, no leak.
My only concern was when removing one of the two centre bolts of the rocker cover I noticed that at sometime it must have been over tightened, some of the thread from the head block was wrapped around it

There was enough thread to hold the bolt, but I didn't torque it all the way to 10Nm as it felt like it was going to give completly.
Is it possible to get the block re-tapped? Will just one bolt not tighted to torque cause the gasket to leak?
Your right about the oil filler cap, I wipe the block doen so I can see any leaks, and there's oil seeping out of there.
The new crankcase breather valve from VW stealers is £50 + VAT!!!

There's enough of the old T pipe left to push on the breather valve, and I'll propably get a jubile clip to make sure it stays on (till I find out if ECP do one, or grab one from a scrappy)
The main problem that took the car of the road still exist, the cooling fan doesn't turn, new fan/motor (works if I short the switch, new thermostatic switch. I did notice that the raditor seems cold even though the pipes are hot, and the hot temp is all the way, the pressure cap is leaking as well.
I'm on my way back out to see if I can solve the fan problem, I suspect an air lock, hope it's not the pump, don't know how to do it but I've got to get my car back on the road before Monday.