Avro Lancaster PA474 is a four-engined, Second World War era, Avro Lancaster heavy bomber operated by the Royal Air Force Battle of Britain Memorial Flight as a tribute to all members of Bomber Command during the Second World War.

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.