pbr A special constable who assaulted an off-duty soldier while attempting to arrest him was jailed for three years today.br ppbr 40-year-old Peter Lightfoot attacked Lance Corporal Mark Aspinall outside a bar in Wigan, Greater Manchester, in the early hours of July 27, 2008.br ppbr The incident was caught on CCTV, which showed Lightfoot pushing the soldier's head into the ground and striking him with a police helmet.br ppbr He was found guilty of the assault on the soldier, who served in Afghanistan and Iraq, by a jury at Manchester Minshull Street Crown Court last month.br ppbr Lightfoot has now been jailed for one year for perjury, in relation to evidence he gave in court, and two years for assault, to run consecutively.br ppbr Two other officers involved in the incident, Sergeant Stephen Russell, 34, and Pc Richard Kelsall, 29, were cleared of assaulting the soldier.