One of our favourite West End hotels, St Ermin's not only has 331 super comfortable rooms and an enviable location in Westminster, it also has back stories for days. In the 1930 its Caxton Bar was a centre of espionage activities (MI6 being close by), and there's a Division Bell to call back supping MPs to Parliament – by secret tunnel!
Superior rooms like 227 are quite small; go for deluxe room 456 that looks out to Broadway. There's a lovely rooftop garden with vegetables and beehives and a wonderful and very leafy forecourt.