Lieutenant Colonel Rupert Stuart Michael Thorneloe MBE (17 October 1969 – 1 July 2009) was a British Army officer who was killed in action on 1 July 2009 near Lashkar Gah, Helmand Province in southern Afghanistan. , Thorneloe is the highest-ranking British Army officer to be killed in action since Lt Col 'H'. Jones's death in 1982 during the Falklands War.