So, it ended up being the EGR as I thought. They replaced it, reset the CEL and away I go, free of charge! Even gave me a complimentry wash, when I picked up the car I had to look twice, as I was suprised it had been washed haha. Hopefully that was indeed the problem, the issue didnt arise on the way back to work, so time will tell.
At least I got a free EGR upgraded valve out of the deal. They said the EGR valve was sticking.
At least I got a free EGR upgraded valve out of the deal. They said the EGR valve was sticking.