When colouring-in books for adults began to appear in shops I was a little scornful, even to the point of imagining the kind of person who might use them. I’ve noticed a pattern in my life: I make a judgement about someone and before long I find it applies to me just as much.

The colouring-in book I bought last week attracted me with its delightful illustrations based on rooms. I have a thing for rooms. It would be like doing a jigsaw, I thought, only it would take up less space, involve choosing and mixing colours, and would last for years. I could listen to podcasts or even audio books while I coloured in.

As you can see, even Felix has developed an interest.