London’s theatre district – Theatreland – is one of my favourite parts of the city. There’s nothing quite like the heady atmosphere of the West End on a Saturday night when audiences are streaming into the theatres that line Shaftesbury Avenue and the Strand to see a play or a musical. I visit the theatre as often as I can, and I knew for a long time that I wanted to write a novel set in that world. Not that I’ve ever had any ambition to be a professional actress (I did take