The Battle of Britain Memorial Flight (BBMF) is a Royal Air Force flight which provides an aerial display group usually comprising an Avro Lancaster, a Supermarine Spitfire and a Hawker Hurricane. The aircraft are regularly seen at events commemorating the Second World War and upon British State occasions, notably Trooping the Colour, celebrating Queen Elizabeth II's 80th birthday in 2006, as well as the wedding of Prince William and Catherine Middleton in 2011 and at air displays throughout the United Kingdom and Europe.

A flight is a small military unit within the larger structure of an air force, naval air service, or army air corps; and is usually subordinate to a larger squadron. A military aircraft flight is typically composed of four aircraft, though two to six aircraft may also form an aircraft flight; along with their aircrews and ground staff. In some very specific examples, typically involving historic aircraft, a flight may contain as many as twelve aircraft, as is the case with the Battle of Britain Memorial Flight (BBMF) of the British Royal Air Force (RAF). In most usages, two or more flights make up a squadron. Foreign languages equivalents include escadrille (French), escuadrilla (Spanish), esquadrilha (Portuguese), patrulă (Romanian), zveno (Russian), and Schwarm (German).