Although these primate enclosures at Blackpool are quite low in height, and fairly old, I think in some ways they are better for the inmates than some more modern and 'open' exhibits(I'm thinking Twycross Gibbon Forest as an example). Here at Blackpool the enclosures have glass windows all around trapping the warmth of the sun and so are almost completely windproof too-like a sort of conservatory, so the temperature inside must be very pleasant for warmth-loving primates as a result. The groups of De Brazzas, King Colobus and others certainly seem to do well here.
