So, update, it's getting much worse
still no EML though..
As noted earlier in the thread about maybe being worse when engine is cold, that is now noticeably the case. When you start it and leave it at idle it almost cuts out and then catches itself every 30 secs or so and is pretty bad driving at lower RPMS, between 1200-2000 roughly, stumbles and catches itself.
Doing more reading on this pointed me towards the EMAP, probably a blocked pipe, but using Carscanner I put the MAF and EMAP on same graph and they pretty much followed eachother exactly, which in my limited understanding shouldn't be the case if there is an issue.
Any other useful live mapping parameters anyone can recommend to look at EGR etc?
It's booked in for diagnostics on Thursday 21st (earliest they could fit it in).