One of Conde Nast Traveller's "favourite hotels," No. 11 Cadogan Gardens in London rarely drops its room rates below $320 per night. With this exclusive deal, Travelzoo subscribers can now stay for $225 (£139) per night, including a bottle of Champagne (worth $79/£49).

Save a minimum of 40% on current rates with this offer, valid seven days a week through March and based on two sharing a Superior Room.

Upgrades are also available -- Deluxe Rooms are an extra $48 (£30) per night and Junior Suites are an extra $113 (£70).

A member of the Small Luxury Hotels of the World collection, the 5-star property is set across four Victorian mansions in the exclusive borough of Knightsbridge. It's within walking distance of designer shops, Harrods, Hyde Park and Buckingham Palace. Condé Nast Traveller praises the hotel's "quintessentially English flavour" and "dramatic decor."

Note: Bookings are nonrefundable and require full prepayment. Prices quoted online and by phone will be in British pounds and include 20% tax.

Not available on: Dec. 28-31; Jan. 5, 12, 18, 26; Feb. 2, 8-9, 14-16, 22-23 (upgraded room types may be available)