There are several distributors who do use "macro" protection including: 

British Film Institute who are probably the most well known distributor plus some of the smaller companies like 

Soda Pictures Head On, Reconstruction etc. 

Momentum Pictures which is a large distributor with a small core of decent foreign films and 

Tai Seng who have released some good films but are very poor in terms of product quality.

And of course Pathe as arsaib4 has already mentioned.

Hopefully the takeover of Artificial Eye will not affect their status, without them, World Cinema in the UK would be in a much poorer position.

Cheers Trev.