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
London City Airport Chambéry) has increased in recent years. London City is at its busiest during the winter months, when a number of airlines, most notably British Airways, Swiss and CityJet, fly to ski resort gateway destinations. Zürich, Geneva and Milan are among the destinations popular among winter sports enthusiasts. Due to the airport's proximity to Central London, it has stringent rules imposed to limit the noise impact from aircraft operations. This, together with the physical dimensions of the long runway and the steep glideslope, limits the aircraft types that can use London City Airport. Mid-range airliners seen at London City include the