Not exclusively UK related, but research carried out in the UK and with a good deal of UK interest, I think:

Modern populations of fallow deer possess hidden cultural histories dating back to the Roman Empire, which should be factored into decisions around their management and conservation.

New research, bringing together DNA analysis with archaeological insights, has revealed how fallow deer have been repeatedly moved to new territories by humans, often as a symbol of colonial power or because of ancient cultures and religions.

The results show that the animal was first introduced into Britain by the Romans and not the Normans, as previously believed. The findings also reveal how British colonial links during the 17th–19th centuries played a key role in spreading the deer around the world, including the Caribbean island of Barbuda, where fallow deer are the national animal.