Hi Kevin B,
Thanks for the post, I had seen the thread when I was having the problems. Sound like they know what they are doing. So what did they exactly do to your car, just a forced regen?
I am aware the MOT rules have changed in Feb about the particular filter but my plan was just to slice it open remove the guts and reinstall. So technically it would still be there, as long as it passes the emissions test it should be fine, I hope. I have herd that you need to cap the fifth injector and the emulator tells the ecu that the filter is there and working. But true fully I haven't had the balls to do it yet lol.
It been about 4 weeks 600 miles since I had the fault, I just put a tub of wynns dpf cleaner in and haven't had the problem since. Since the cleaner I've been using a fuel additive and all has been good. My mpg is still the low side of 30, but since owning the car it has never really higher than 34 mpg I do a lot of short journeys down country lanes so never get to a cruising speed and for ever changing gears. On a long run it use to go up to 47 mpg, so I'll have to see when I next do one. Apart form that the car drives fine.