Colonel Sir William Walter Mahon, 7th Baronet, LVO (born 4 December 1940) is a retired British Army officer.
He served with the British Army in the United Kingdom, Germany, Malaysia, Aden, Hong Kong, Pakistan, and Spain.
From 1993, he was a member of HM the Queen's body guard, the Honourable Corps of Gentlemen at Arms, and served as the unit's Clerk of the Cheque and Adjutant from 2006 to 2008 and as its Standard Bearer from 2008.
[2] For these services, he was appointed Lieutenant of the Royal Victorian Order (LVO) in the 2011 New Year Honours.
[3] He was active as a fundraiser for Macmillan Cancer Relief from 1993 to 2002 and became Chairman of the National Army Museum Development Trust in 2003.