So, I've booked a DPF diagnostic with a company which looks like its got good reviews. This will give a full diagnostic, a deep clean if needed and another check afterwards. They will also be able to check the sensor and whether that is working. Hopefully if nothing else I will know where I stand with the vehicle and be able to move forward, best case they will be able to fix the issue, worst case (don't really want to think about it too much) Found a Bosch sensor for £50 if it needs one and doesn't sound horrendous to fit. Fingers crossed for next Tuesday at least I will know if its the DPF, if not its moving on to oil/ engine pressure etc... a question I am asking myself is are there any CXEBs that are OK out there???