Golf dpf question

[ColinMacC]

I've started taking my 2007 golf 2.0tdi 170 into London for work, It's a 25 mile journey, 20 miles of which is in stop start London Traffic, taking around an hour. I generally take the car once or twice a week, the rest of the time it sits in the garage. My dpf light comes on, on average of every second trip into town. On normal runs, I rarely have this issue, I'm wondering if this is normal, or am I getting to the stage where I am looking at a big bill?

[ColinMacC]

i covered 3000 miles prior to doing the London commute, and it came on once, with quite a bit of start stop traffic, it just seems to really dislike the London commute which is dead slow and stop for 2 hours per day! Couple of people have told me that it's perfectly normal for an early dpf to do this, just wanted a second opinion!

[ColinMacC]

Yeah, I generally skip my Junction on the A3 and take a blast down the M25 to clear it out when it comes on. I just wanted to know if it was a sign that the dpf was near the end of it's life, or if it was normal for older units to clog up in stop start traffic