My mate says the issue with my car is because of short journeys??? Watch
better take the car to a mechanic to see if it is the DPf problem
or it could be the EGR problem
most cars needs a good run now and again. to heat up and burn the damp moisture whether it is inside the engine, and exhaust pipe being build up with damp .
a car engine is not like a switch : on or off. There are many integral parts which need to be moisture free to be optimise in operation..
And the UK cold wet weather is also different from a hot sunny dry country
so go for a long drive, at least once a month
the DPf - known as diesel particle filter
EGR - air intake valve