Is it me, or are you starting to find those colouring books for adults really irritating? It started with a couple of books of floral patterns claiming that you could reach inner peace and enlightenment through the medium of not going over the lines. Now its got to the point where Tescos supermarket has an entire section in its book department devoted to them. Every two bit publisher has got an artist to doodle on a few pages and then packaged it as a really expensive colouring book. I’ve even seen a book of W Heath Robinson cartoons repackaged as a colouring book – and that’s sacrilege.

I’ve been doing colouring-in since I started drawing Smith, and I haven’t noticed I’ve achieved any inner calm since doing it. In fact colouring in the trees over the last three months of park-based strips has been really fiddly. I’ve rather enjoyed doing this strip in black and white and then going bonkers with the colours in the last frame. Now, that’s therapy!