Shooting at hives? that's a first for me. I will talk to the farmer where the bees are at the weekend and discuss.
Thanks for all the ideas and support. I have access to lots of scrap timber so I may build a frame of some kind for next year. It won't stop anyone throwing stuff at the hive but it will stop it moving.
There is just the brood box there at the moment so it is "bottom heavy" as it were, but when there is a tower of supers on there in summer it would be much easier to topple.
The hive is quite remote, and under the eaves of a spinney though visible over the nearby hedge to a field. In summer of course the hedge is thick and full of leaves but now they have started to drop the hedge doesn't provide the visual screen protection that it did.
I suppose it could have been worse and I should count my lucky stars really. It was just a hassle trying to sort it all out in the dark. The entrance block had dropped out in to the long grass