Captain David Hart Dyke CBE LVO ADC RN (born 3 October 1938) is a retired Royal Navy officer, former aide-de-camp to HM The Queen, and former commanding officer of HMS Coventry which was sunk during the Falklands War. In 1967 he married Diana Margaret Luce, daughter of Sir William Luce; they have two daughters, Miranda and Alice. His nephew is modern-day plant hunter Tom Hart Dyke, heir to Lullingstone Castle.