You can book a hotel in London, UK using two main modalities:
1. Instant booking: can be done for a hotel which is a participant to the Instant Booking Program. This program allows customers to know immediately if there is an available room for specific dates. When booking is done and paid, the hotel also would know immediately about that.
2. Postponed booking: done for all other hotels, which do not make booking data available on the Internet. To effect such a booking, staff of the Directory booking service will forward the booking to the hotel staff, obtain their confirmation and inform the customer that the booking can be paid.