LONDON (Reuters) – So-called “zombie knives” and machetes will be banned in England and Wales from September, the British government said on Wednesday, making it illegal to possess, sell, manufacture or transport them as it seeks to assuage concerns over knife crime. Legislation will be introduced to parliament on Thursday, the Home Office said, with a surrender scheme planned over the summer to give people who have such knives a chance to voluntarily hand them in. Actor Idris Elba this month launched a campaign to combat knife crime in Britain, demanding a ban on machetes and zombie knives – …