According to ISIS they only have 0.1.
The male may have died, and the female moved to another zoo, where she could have some company. They're social animals aren't they?
i doubt they would have recently moved the female abroad recently what with fmd and bluetongue scares at the moment,
I see little hope for a self-sustaining gaur population in the UK, now the entire UK stock (admittedly derived from Berlin Zoo stock) are down to just the one female.
I was at Whipsnade earlier this year and the Gaur had been moved to the old Black Rhino house to make room for the extension of the Indian Rhino accommodation.