Tesco offer a wide range of DVD's for sale online.
http://www.tesco.com

Bensons World is a part of Mr Bensons World Of Home Entertainment, the longest establishment video online & mail order company in the UK. We were established in 1980 as a video rental shop, one of the first in London, and in 1985 we started selling videos to customers worldwide by mail order. We simply offer friendly and efficient service, competitive prices, full range availability, up-to-date news and regular special offers.
http://www.bensonsworld.co.uk