London and into the Home Counties with a branch to Heathrow Airport. It is Europe's biggest construction project, with a £15 billion projected cost. London is the centre of the National Rail network, with 70 per cent of rail journeys starting or ending in London. Like suburban rail services, regional and inter-city trains depart from several termini around the city centre, linking London with the rest of Britain including Birmingham, Brighton, Reading, Bristol, Cardiff, Derby, Exeter, Sheffield, Southampton, Leeds, Liverpool, Manchester, Cambridge, Newcastle upon Tyne, Edinburgh and Glasgow. Some international railway services to Continental Europe were operated during the 20th century
Groton–New London Airport the onsite fixed-based operator. Columbia Air Services (since 1983) and Lanmar Aviation (since 2003) have been the two fixed-base operators serving the airport. In 2012, faced with declining demand for services, the two proposed merging their Groton operations as a joint venture called Mystic Jet Center. In January 2013, the U.S Department of Justice's Antitrust Division announced that it would not interfere with the merger, citing sufficient competition from nearby airports. Groton–New London Airport Groton–New London Airport is a state owned, public use airport located three nautical miles (6 km) southeast of the central business district of Groton, a town