sentences:  Scheduled services from Gatwick to Tripoli began in July 1971.On each of these routes BCal replaced BOAC as the designated UK flag carrier.On 1 November 1971, BCal started scheduled flights between London Gatwick and Paris Le Bourget Airport, where it replaced BEA's London Heathrow—Paris Le Bourget service and competed with that airline's Heathrow—Paris Orly Airport service.