The Gorton and Denton results should urge the Government to seriously look at introducing an alternative vote system before the next election, or chaos will surely reign, writes David Aaronovitch L ast week, I played an informal game with some acquaintances: would it be worse for Labour if the Greens won the Gorton and Denton by-election, or if Reform’s Matt Goodwin did ? The argument for the Greens was that their victory would suggest the existence of a viable party to Labour’s left that would