TEN Rolls Royce Merlin Engines in harmony! In August 2014 while the Canadian Warplane Heritage Museum Avro Lancaster bomber C-GVRA was in the UK it flew in formation with the Battle of Britain Memorial Flight Lancaster and Avro Vulcan XH558 between RAF Waddington in Lincolnshire and RAF Marham in Norfolk.
This short video shows part of the short display at RAF Marham when the two Lancasters were joined by a BBMF Spitfire and Hurricane.
Source: TouTube