Polpo's recipe for London's ultimate negroni
London bars are doing an ace job of making negronis, but if you want to try it at home, Polpo's bar manager Tom Ross has the ultimate recipe — explains why getting the negroni right is so important

Perfection: Polpo's negroni (Photo by Jenny Zarins, Polpo by Russell Norman is published by Bloomsbury)
Jenny Zarins, Polpo by Russell Norman is published by Bloomsbury