10 Downing Street is the Prime Minister's home and office in Westminster. In 1868 Benjamin Disraeli lives here, and Jacob's work as his bodyguard in Sequence 7 starts outside the house.
In The Bodyguard, Jacob watches from a nearby tower as Disraeli and his wife Mary Anne leave the house and climb into their carriage. Mary Anne later asks Jacob to come back to Downing Street so he can take her through the Devil's Acre, and Driving Mrs. Disraeli begins in the house's back garden.
The terrace was built by Sir George Downing in the 1680s, and Robert Walpole became the first Prime Minister to live there in 1732. Many later Prime Ministers preferred their own houses, so the place was run down by Disraeli's time.
Devil's Acre
The Devil's Acre is a slum in Westminster and Lilla Graves' Blighter stronghold, described in game as the most violent stronghold in London. It also features in the main story when Jacob escorts Mary Anne Disraeli through it.
Admiralty
The Admiralty is a government office on Whitehall in Westminster, one of the period buildings you can climb and read about in the in-game database. No memory centres on it.
Banqueting Hall
The Banqueting Hall, later the Chapel Royal, is a 1622 hall on Whitehall in Westminster and a database landmark in Syndicate. It is the only surviving part of the old Palace of Whitehall.
Blue Anchor Alley
Blue Anchor Alley is a Blighter stronghold in Westminster run under Lilla Graves, one of two in that borough. Freeing it lets the Rooks set up there instead.