British Caledonian in the 1970s 31 March 1973 - with the BR airline designator it had inherited from BUA at the time of its formation. This resulted in exclusive use of the BR designator as a prefix for all BCal flight numbers. In 1973, BCal also inaugurated its fourth scheduled domestic trunk route between London Gatwick and Manchester. The new service was contracted to British Island Airways (BIA), BUIA's successor, which operated two daily return trips using its Handley Page Dart Herald turboprops. On 20 March 1974, BCal switched its Gatwick—Paris services to the then brand-new Charles de Gaulle Airport in the northern Paris suburb
Leipzig/Halle Airport the airport for NATO and EU military aircraft. The airport was built new from scratch at a location between Halle and Leipzig from 1926 and opened in 1927. On 18 March 1986 Air France flew a Concorde to the airport, to coincide with the world-renowned Leipzig trade fair. Two days later British Airways also flew a Concorde to Leipzig/Halle. In the following years, both airlines operated Concorde flights from Paris and London when the trade fair was held in Leipzig. Despite its name, the airport ground property tax goes to the county of Delitzsch. A deal between the city of