Lieutenant-Colonel John Gaff GM (27 May 1927 – 28 November 2013) was a British Army officer who was the senior bomb disposal expert during his service in Northern Ireland in the mid 1970s. He was awarded the George Medal for his personal courage during bomb disposal operations. He was president of the Gallantry Medallists League from 2002 to 2008. John Maurice Gaff was born at Guildford, Surrey and educated at the Royal Grammar School, Guildford. He joined the British Army in 1944 and was commissioned into the Queen's Royal Regiment in 1946 and served with the regiment in Palestine.