For the OP, It will all come down to your FLO/FLD and whether they are helpful or obstructive - the chambering itself is appropriate and legal in England and Wales if loaded correctly. Putting together legal loads for Scottish use might be more of a PITA.
I'd love one - and it will probably happen at some point - but then I'd love a lot of things!
Which police authority are you under, and are they supportive or awkward? If they're supportive you won't have an issue. If they're awkward then you'll have to do more in the way of constructing a justification e.g.; wild boar, heavy cover, especially heavily bodied deer on the land you stalk - whatever. It sucks, but you might have to "play the game" a little. My own personal philosophy is that the bigger the hole you make in the deer, the faster it will bleed out and the better trail it will leave if it runs at all.
Good luck and pictures if you do it!