Eliza:
I'm not sure if deer in UK have any natural predators. We have no wolves (only the football variety) and the only other way they are killed is on the roads.

There are no natural predators other than man, but to say the only way they're killed is on the roads is just not true....deer are culled in the UK in significant numbers, from stalking in Scotland to less publicised culling in England and Wales. They're not culled in sufficient numbers though, hence the population explosion in the last 15-20 years.

I've recently been the beneficiary of venison donations from near Forres and from Devon, both of which had been shot. Closer to home I've regularly enjoyed venison in Kent which had been shot by a farming friend.