That firm is trading illegally because:
(a) there is no valid postal address on the website ; and
(b) just because a film has been shown on TV, that doesn't place it 'in the public domain' (as the site owner claims) and therefore beyond the law relating to the unauthorised copying of copyright materials.
A bit of research shows that the 'business' is actually run from a semi-detached house in Little Hulton, Manchester. So it's almost certainly just a guy recording stuff off-air and illegally selling it on.
This thread is relevant:
http://www.thewholesaleforums.co.uk/threads/reporting-a-seller-has-anyone-else-every-had-much-luck.93430/
Avoid!