Inlet, exhaust cam position problem, maybe?

[spannerrash]

Thanks once again MJ.

I will do the compression test again tomorrow but I doubt it will change the result. I've been round all cylinders multiple times as I was struggling to believe the results. There are no spark plugs fitted at the moment nor during any of the previous tests so cranking speed is quite high. I have already bounce back and forth between cylinders 1 & 5 to see if continually repeating the test would change the results but it never has.

It may seem a little counter intuitive but I'll do the test again tomorrow with the spark plugs in, obviously apart from the one I am testing. It will be interesting to see if I still get the same discrepancy at a slower cranking speed.