1972 was also the year BCal introduced the UK's first-ever "no frills" type service on the two main domestic trunk routes linking London and Scotland. The airline introduced simultaneous night-time departures from Gatwick, Glasgow and Edinburgh, resulting in an overall frequency increase to six daily round-trips on each route. The company charged a very low £5 one-way fare on these night-time services, which were marketed under the "Moonjet" trademark. This move, which was modelled on the high-frequency-low-fares operation run by Pacific Southwest Airlines (PSA), the original "no frills" airline, along the busy San Diego—Los Angeles—San Francisco air corridor in California, boosted passenger numbers and profitability on both routes.