It's part of a rewilding effort. They'll be moving exmoor ponies, longhorn cattle, and iron age pigs to this particular woodland as well to recreate the kind of situation that would have existed before the advent of intensive agriculture.
I don't believe there's any evidence of Bison being native to the UK, although there were certainly Aurochs (wild cattle, hence the longhorn cattle), so this isn't a reintroduction as such; nonetheless, it's pretty cool.
More me mocking UK conservationists. Eagle owls are considered too much of a threat for the UK.
At least it seems that farmers got that red kites eat rodents and pests, not their livestock, through their thick skulls at long last.
Ah, fair enough.
We'd probably have an easier time getting birds of prey into the country if the aristocracy stopped gamekeeping for shooting though >:(