I wrote an easy London walk for the Virago blog, which some of you may want to do, either as Londoners or visitors. Here’s the walk. It might take as little as 30 minutes if you run as fast the boys do in the book, but it could also be a gentle couple of hours – longer if you stop for a coffee or a pint on the way.

I took a selection of photos when I was writing it, here are some of them.

I’ll send a signed copy of London Lies Beneath to the first person to comment here with the photos in the right order from Trafalgar Square to Walworth – just write up what the photo shows.

Here you go …