Airports of London cannot be expanded due to the docks on either side. It is also the only airport serving London which does not operate at night. A light rail service from London City Airport DLR station, which adjoins the terminal building of London City Airport, links it to the financial district of the City of London at Bank and Monument stations, which offer interchanges with London Underground. Located in the London Borough of Hillingdon, Heathrow is by far the largest of London's airports and considered the main gateway into the United Kingdom for non-European visitors. Heathrow has four terminals and two parallel
Automation of the London Underground trains to become operational on the London Underground network within a decade". That was cheered by Brian Paddick (Lib Dems), but Ken Livingstone (Labour) said it was a 'vanity project', and Jenny Jones (Greens) said that she had concerns over the safety of driverless trains. The then deputy cabinet member for sports, leisure and customer services at Westminster City Council, Richard Holloway, launched a petition in August 2015 demanding the introduction of driverless trains. The New Tube for London programme will include driverless tube trains. However these will initially have a driver on board until old stock has been fully