Just found this link to the Biggin Hill airshow commemorating the "Hardest Day" of the BoB - 18th August, 1940. Some seriously beautiful pic's of Spitty's and Hurri's.
http://www.globalaviationresource.com/v2/2015/09/08/battle-of-britain-75-pt-13-biggin-hills-hardest-day-commemoration-180815/