Do you mainly do town type driving? I was led to believe it needs a good run out - 60+ mph to regenerate.
I know some garages (Not Vauxhall) offer a DPF removal / bypass system but obviously not advisable within warranty. The chip is probably a 'remap' that changes settings in the computer about when and how to do a DPF regenerate. The article below suggest some ship companies are simply turning off the icon on the dash:
http://www.evolutionchips.co.uk/Diesel_Particulate_Filter_Removal_DPF.html
I know some garages (Not Vauxhall) offer a DPF removal / bypass system but obviously not advisable within warranty. The chip is probably a 'remap' that changes settings in the computer about when and how to do a DPF regenerate. The article below suggest some ship companies are simply turning off the icon on the dash:
http://www.evolutionchips.co.uk/Diesel_Particulate_Filter_Removal_DPF.html