The best tapir enclosure in the UK is undoubtedly the complex at Port Lympne, originally intended for Sumatran Rhino, until their female died and the male was returned to Indonesia (he was mixed with Malayan tapir for some time until his departure). They hold 2.4 Malayan Tapirs, including a calf born last year, in large wooded paddocks.
The other malayan tapir in the UK are 1.1 at Belfast (breeding pair), 2.1 at Edinburgh (breeding pair with calf born this year, the female is the 2004 calf born in London zoo), 1.1 at Twycross, 1.1 at Sandwich in Kent (possibly from Howletts as the Howletts pair vanished around this time), and 1.1 at London Zoo.
The tapir enclosure at London zoo is well-planted despite the small area, but since the birth of the calf in 2004, they have allowed public access to the indoor quarters again. The vast wooded banks below the clore pavillion could easily be fenced for these animals, it seems such a shame that more collections don't house them in the same way as port lympne.