London does Christmas so well that it would be wrong not to throw yourself into it with full commitment. My favourites are the fairs. This weekend you’ll find me manning the hot-chocolate stall at my kids’ school next to Primrose Hill (Come down! It’s a state school! We need your money!), which, as well as being all kinds of jolly, functions as a fundraiser. Like most schools in the state sector, cuts mean it will be tens of thousands of pounds worse off this year, and if the hole can be part-filled by a bunch of mums (it’s always mums) making jam to sell at £3 a pot, then make jam we will, as though feminism never happened. We’ve found no minor celebrities to open the fair, but there will be Mariah, mulled wine and drunk parents pretending to be sober — like an episode of Motherland.