Pop art legend Sir Peter Blake celebrates his 80th birthday this year, with a new version of his famous Sgt Pepper album image and a wide-ranging exhibition at The Mall Galleries. I went to the private view last night with Maggie, and found not just pop art but also some beautifully dreamy collage work. This one is my favourite, from the ‘Venice Fantasies’ series. On a good day, the world looks a little bit like this.