Who Lives at 1 London? (Not the Prime Minister)

No one famous lives at "1 London." It's a common confusion.

• 10 Downing Street, Westminster — Official residence of the UK Prime Minister (since 1735).
• 1 London Wall, EC2 — Office building (Barbican area).
• One London (1 London) — A luxury residential tower in Canary Wharf (E14), completed 2003. Private apartments; residents are wealthy individuals, not public figures by virtue of address.

The PM's correspondence address is "10 Downing Street, London SW1A 2AA." "1 London" is purely a marketing name for a high-rise.