Covent Garden Spa Hotel

The latest "Top Secret" hotels!
Quite a lot of 5* hotels available on last minute for less than £90/night!!!
Anyone has an idea which hotels they might be?
1. Luxury Hotel near Tower Bridge, with pool and gym
This brand new hotel provides luxury accommodation and state-of-the-art events facilities within the famous Tower Bridge area. The hotel amenities include a 32 inch flat screen digital TV, individual climate control and king/queen size beds, as well as a large indoor swimming pool, a gymnasium and a spa.Trip Advisor Certificate of Excellence Winner
2. Superb Spa Hotel with pool in iconic location
This hotel offers luxury facilities and great views over London for all travelers. Dining in the hotel's restaurant is a great experience, enjoy local and international dishes with exceptional service. All guests enjoy complimentary use of the swimming pool, gym, steam room and sauna.
3. Fabulous Spa Hotel near Covent Garden & West End
This hotel is perfectly located in the heart of Central London within walking distance to Oxford Street, Covent Garden, West End, the British Museum and the British Library. It offers complimentary use of its luxurious swimming-pool, gym, steam and sauna to all guests.
4. Amazing City hotel with luxury spa and pool
This luxurious and elegant hotel in the shadows of one of London's finest landmarks is the place to stay during your visit to the capital.The hotel features three restaurants and a 24-hour bar where you can enjoy all your favorite drinks. Guests can use the luxurious health club and indoor swimming pool, steam and sauna free of charge during their stay. Trip Advisor Travellers' Choice 2012
Would be grateful for advise as I am planning to book one of those for my wife as a surprise after her Christmas Party!