It doesn't often snow in London. And when it does, it usually melts quickly.
In fact, the last really severe winter was in 1980, and before that 1963.
So I thought you might like to see a picture of the blog sledging today on Hampstead Heath - where a 400m run was available down to the ponds. In the background of this photo, taken from the top of Parliament Hill, you may be able to see the Post Office Tower.