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
Sheriffs of the City of London populous parts of Middlesex were included in the new County of London, which had its own High Sheriff. Sheriffs of the City of London Two Sheriffs are elected annually for the City of London by the Liverymen of the City Livery Companies. Today Sheriffs have only nominal duties, but previously had important judicial responsibilities. They have attended the Justices at the Central Criminal Court, Old Bailey since its original role as the Court for the City and Middlesex. The Sheriffs live in the court house complex during their year of service, so that one of them can always be attendant