Brake light seems to be functioning correctly when the peddle is pressed and no further codes have come back or lights on.
I decided to shoot the parts cannon at a new delphi coil pack as I had a haas one which I've read can cause issues on this engine. That made no difference. pffft.
New air filter was put in as it was due, not in too bad a condition.
Two new delphi wishbones as well, a bush was detached did wonder if that could be the issue of the noise but not that. All these things needed doing except the coil pack which was just a shot.
local usual garage said they haven't got a clue and suggested going to vauxhall, who said it will be £110 to look at in end of August. The garage mentioned the drop links twist left and right without much force but not knocking/worn on the ball joint. They don't make the noise I have he said.
He said he's fairly sure it must be engine related but doesn't sound like transmission issues. He said he would expect a pre detention error code or something but nothing is there.
Or I could save that diagnostic fee and put it towards to egr channels and hope for the best. He said his diagnostic machine says the egr gasses are flowing. I did wonder if its flowing enough or partially blocked.
He mentioned the knock sensor was reading ok.
Had a look at my egr valve and it looks like one of the bolt is stupidly corroded and will crumble literally coming off, did think maybe worth cleaning that.
Just thought I'd post an update.