Return of the smog ?

Woke up to 3 or 4 inches of snow this morning - after forgetting to set the alarm last night and getting up late at 0530.

Once I'd cleared the snow off the van - I presumed today's blip would be a snow cityscape but London wasn't as covered as the suburbs. While waiting on Pier Road for the Woolwich Ferry to turn up I took a few potentials - that's Thames Barrier Park in the distance which you can see through the smog.