Where can one go online to get the best London hotel deals?

* Booking.com: Booking.com is one of the world's largest online travel agencies, and it offers a wide variety of London hotels at competitive prices. You can also find exclusive deals and discounts on Booking.com, such as Genius discounts for frequent travelers.

* Agoda: Agoda is another large online travel agency that offers a wide selection of London hotels. Agoda is known for its low prices, and it also offers a loyalty program that allows you to earn points for every booking you make.

* Expedia: Expedia is a popular online travel agency that offers a wide variety of London hotels, flights, and vacation packages. Expedia often has flash sales and discounts, so it's worth checking the website regularly for the best deals.

* Hotels.com: Hotels.com is a hotel booking website that offers a wide variety of London hotels, from budget-friendly options to luxury properties. Hotels.com also offers a rewards program that allows you to earn free nights for every 10 nights you book.

* TripAdvisor: TripAdvisor is a travel website that offers a variety of information about London hotels, including reviews from other travelers. TripAdvisor also has a hotel booking feature that allows you to compare prices and book rooms at the best price.