Here's a deal from DD Home Entertainment. This is a relatively new company, but seems to get good mentions on other forums. If you make a purchase of £20 or more, they will give you collectable holiday vouchers worth £50. See the list of eligible tour operators below.
Tour operators: General Holidays - Airtours, Argo, Bales, Balkan, Bellair, Bridge, Cadogan, Cosmos, Cypon, First Choice, Getaway, Havanatour, Hayes & Jarvis, If Only, Inghams, Intourist, Jetlife, Jewel in the Crown, Kirker, Kosmar, Kuoni, Libra, Longwood, Manos, Olympic, Panorama, Premier, Prestige, Somark, Style, Sunspot, Sunvil, Tana Travel, Thomas Cook, Thomson, Tradewinds, Virgin.