Thanks for the replies so far.
FEO is coming to inspect cabinet next week due to house move, want to put in a variation with him at the same time. Looking for a deer calibre that will also be ok for all other legal quarry. Looking for something that i can do so longer range targets with from time to time too. Hence investigating the larger calibres.
My 6.5x55 is conditioned for "Deer and Any Other Lawful Quarry", and Thames Valley have confirmed that covers me for boar.
Now, boar come in different sizes, so it's my judgement once one is in my sights, and I look forward to the day when I have to make a decision, but stepping up to 156gr Lapua Mega will do the job on most...!
then ask them to explain.
make sure you have your velocity and energy figures to hand when you do
or better still ask them for both rifles and then just shoot the foxes you see when out stalking or "returning from stalking with a lamp in hand"