London Biggin Hill Airport reported a 23% increase in commercial business aviation in 2015. Located in the Borough of Bromley, just 12 miles from the centre of the city, it is the only facility in the Greater London area dedicated to business aviation. The former Battle of Britain air station, which became a civil airport in the 1960s following the closure of Croydon Airport, claims to offer low operating costs and also benefits from having no operating slot restrictions. The airport is proving increasingly popular with operators of larger cabin aircraft according to Business Aviation INSIGHT published by data specialist WingX Advance. The facility has also benefited from the introduction in late 2014 of the London Heli-Shuttle, which connects to the London Heliport in Battersea. This connection is promoted as offering a substantial time saving over ground transfers into the city. The new service was used some 650 times in its first year of operation.