Aye mate I've changed the oil, got the 5w30 in. I've changed the oil filter too. I've also changed the ISCV. The ICSV got rid of the horrible idling problems, but the cutting out is still there when it's cold :/ I've also done numerous proper ECU resets.

I haven't changed the fuel filter, and I haven't really looked at anything else.

Any other ideas mate? Cheers btw