All sorted and back to running how it should.
Turned out to be what I thought and hoped it was.
Messing around with the fuses in the engine bay and I didn't put them back in the right place.
Fuse 13 was missing, this is for the Engine Control Module and Fuse 23 missing, this is for the N75 Valve, the N80 Valve and the DV.
There was a very worrying moment when the codes were read and it came back with just about every possible engine error!
Replaced the fuses and everything is now back to normal.
This will teach me to be messing around with electrics in the dark!!
Want to say a massive thank you to MAT ED30 who came over to mine with his VCDS, he went out of his way to help me. Top, top bloke.