I expect you can only keep them under license....
Exotic, Dangerous or Wild Animals
Licenses to keep exotic, dangerous or wild animals are issued under the Dangerous Wild Animals Act 1976| [External]. A list of such animals can be obtained from the Department for Environment, Food and Rural Affairs |[External].
Where appropriate, we will arrange for the premises to be inspected by a veterinary surgeon to ensure accommodation is suitable for the welfare of animals.
The licence will be issued subject to compliance with licence conditions and payment of the licence fee and is renewable annually.
Application Form| (pdf)