The term "Grey area " springs to mind, has it hasn`t been done before there wouldn`t be a precident set,yet!
I think it wouldn`t be allowed,same as for deer (if i got it right).
I did hear of a chap in South Wales who wanted to hunt deer with a Eagle/Buzzard/Hawk or whatever, and he was told it`s illegal.
Would have to be some bloody good dogs.