One of the main London theatre ticket agencies. The company has been trading for over 30 years. Members of the Ticket Agents Association.
http://www.londontheatrebookings.com

See what is available and snap up online last minute bargain tickets for many of London’s top shows from the TKTS ticket booth in Leicester Square, the only official half price and discount theatre ticket booth in London.
http://www.tkts.co.uk

Comprehensive online ticket agency. Ticketmaster serves more than 8,000 clients worldwide and acts as the exclusive ticketing service for hundreds of leading arenas, stadiums, performing arts venues, and theaters.
http://www.ticketmaster.co.uk