A bit of an update.

I refit the original pressure sensor. I removed the fuel vaporiser fuel pipe and used an air line to blow it out. I dropped downmiddle section of exhaust to make sure the vaporiser wasnt blocked.

I did a regen using my FORscan,loads of shit came out of the back. So far my car hasn't done a dpf regen since. I dont know if these cold days are effecting it though.

I will have a look at that link later.