Hedgehogs defo.. Great predator but for a quick solution until you have yourself a few hedgehogs (rescue centres are happy for you to adopt them if you have the right habitat) is to find a friend with ducks and borrow them for a bit.. Indian runners are great at eating every snail and slug in...
I figure that if I keep all the wild animals on my property well fed (especially the woodpeckers) then they are less likely to focus on my hives.. I also leave most of my old silver birch trunks rather than cutting for firewood because as they naturally rot down, the woodpeckers have a field...