X-Plane 9.70 Scenery--London Elstree Aerodrome (EGTR), UK. London Elstree Aerodrome is an operational general aviation aerodrome located in Elstree, and is situated 2.6 nm east of Watford, Hertfordshire, England. Home to the Elstree flying club. Open and close hangar doors with "flaps up/down". Requires OpenSceneryX. By Tony Brown (Mercedes).