Airbus A300B4 - Dan-Air London
Dan-Air London was a British airline (not Danish! - Dan stands for Davies and Newman) operating scheduled and charter services. In 1986 it flew a single Airbus A300B4, leased from the German charter airline Hapag-Lloyd. In the end of that year Dan-Air returned this aircraft to Germany, but the airline immediately introduced two other A300s, which were operated until 1990.
The airline ran into financial problems in the early 1990s and was swallowed by British Airways in 1992.
The aircraft on the picture is being pushed back at London Gatwick Airport.