Darn it...Last week I booked the car in for an MOT for this Wednesday and then the EML comes on over the weekend. Forscan shows P2463 code - Soot accumulation.
The car drives fine with no loss of power.
On Sunday 26th Feb I drove the return trip along the M4 to Bath from Heathrow, so a pretty good run. Prior to that, it was sat for 3 weeks in an airport carpark. But I drove to Heathrow from Bath to get there.
I've read a few posts on here and the Forscan forum that have suggested an italian tune up, which so far hasn't worked (but I've only been driving my normal roads but in a lower gear). Hopefully I'll get on the motorway tonight for a longer run.
Another suggestion was that it could be a blocked sensor rather than the actual DPF, worth trying if the above doesn't work?
I've not got under the car yet and don't know where the sensor is, but I guess it would be obvious.
Any other suggestions on what to check please?