Embassy Guards

[Suhiir]

Does anyone know the name of the organization/unit that provides security (guard) services for the UK and French (and German/Russian if my info is wrong) embassy's in foreign countries?

France - National Gendarmerie (found it!)
Germany - BPOL (Bundespolizei)
Russia - FSB (Federal'naya sluzhba bezopasnosti Rossiyskoy Federatsii)
United Kingdom - ?
USA - MSG (Marine Security Guard)