ok so after getting car back think the calliper wasnt just the issue, been reading abit of on-line stuff and found some information about it the DPF.

Now after so many miles some light should come on the dash to show you the car is going through a regen.
Now I have done over 20,000 miles since having my car and I have never seen this light on.

Should I be asking vauxhall why??

Does this DPF ever need changing?