So I bought an endoscope camera from Amazon as I wanted to do some investigating around the EGR pipe.
I've made a short video with 2 clips -
https://youtu.be/eW-IoAdNwvo
Clip 1 follows the EGR pipe to the connection at the back of the engine.
Clip 2 explores lower down in the engine below where the smoke was coming from.
Hopefully it gives an idea of where in the engine the camera goes.
And for those who don't want to watch a video, I've got some photos.
Picture 1 is the EGR pipe connector at the back of the engine
Picture 2 is lower down in the engine below where the smoke was coming from.
Picture 3 is the EGR pipe
Would be interested to hear if anyone has any thoughts!
Also I highly recommend getting an endoscope camera. Connects to a phone and only costs £20!