Today, apart from changing the sheets and taking out the garbage, I have a job that gives me some satisfaction: playing God. Which, of Dr Dan’s previous cast of thousands, will survive to Book 5? Some people like designing gardens or rearranging furniture. My thing is playing the Grim Reaper, but with a red pen…

… on the way to the supermarket. I rediscovered my Get Up and Go. Or, more accurately, my Get Up and Write. Walking has often served me as a pipe-opener, literally and figuratively, and I go out for a walk most days, exploring my new neighbourhood, piecing together the jigsaw of London. But it was…