In December our thoughts turn to Christmas. We think about our family, friends, Christmas cards, food (lots of it!) and presents - will Santa pass by this year? Also, just as important, the reason for Christmas: the birth of Jesus. But what we also think about is the weather - will it snow? This question set me thinking – why do we feel Christmas isn’t really Christmas if it doesn’t snow?

Visitors who arrive in London via Heathrow Airport will pass the Hogarth roundabout in Chiswick as they approach the city along the A4 from the west. They may see the house in which William Hogarth (1697 – 1764) lived, which is now a museum. Their Blue Badge Tourist Guide may even tell them that it is believed that Hogarth’s habit of sketching people’s faces on his thumbnail gave us the phrase ‘a thumbnail sketch.’