Another bump.
I have 3 x nesting/hibernation boxes in my garden, Riverside Woodcraft Gold, which are predator proof. I've cut holes in the fencing that is mine, 13cmx13cm, other fences have holes underneath, they can pass through. I leave fresh water and poultry flavoured cat food and cat biscuits in a feeding station every night.
So many people say "I haven't seen a hedgehog in my garden for years/ever", but all you need to do is make your garden hedgehog friendly, and it's easy.