BBC Democracy Live - PM: Mitchell is owed an apology The prime minister has added his voice to criticism of West Mercia Police over how it dealt with the aftermath of a confrontation between former chief whip Andrew Mitchell and officers. The topic was raised by Labour chair of the Home Affairs Committee Keith Vaz at prime minister's questions on 16 October 2013. Mr Vaz referred to the Independent Police Complaints Commission's "damning report" on the matter, which, he said, "goes to the heart of the issue of integrity and ethics of the police." Giving evidence to his committee on 15 October, Home Secretary Theresa May condemned West Mercia Police force as "quite wrong" not to take disciplinary action against officers accused of trying to discredit Mr Mitchell. You can watch her evidence in full here, from around 40 minutes into the video. Mr Mitchell, who served as international development secretary before taking up the post of chief whip, resigned from that job in the furore surrounding the incident. The prime minister said: "I agree 100% with what the home secretary said yesterday." He added: "He is owed an apology, the conduct of these officers was not acceptable, these things should be properly investigated, as the home secretary has said." It was right, he specified, for the Home Affairs Committee to "discuss this with the chief constables concerned and try to get to the bottom of why better redress has not been given." The chief constable of West Mercia Police is due to give evidence to MPs next week. Gas a badger Earlier in the question session, Labour leader Ed Miliband raised a laugh when he took aim at David Cameron's environmental and energy credentials. Who was it who said 'Vote blue, go green'? I think it was you. Who was it who said as leader of the opposition 'I think green taxes as a whole need to go up'? It was you," Ed Miliband pointed out. He continued: "Do you feel faintly embarrassed that in five short years you've gone from hug a husky to gas a badger?" Mr Cameron retorted: "The only embarrassing thing is this tortured performance." On energy prices, he told the opposition leader: "Let me remind you on the cost of living, they [Labour] doubled the council tax, they doubled gas bills, they put up electricity bills by half, they put up petrol tax 12 times and they increased the basic state pension by a measly 75p."