The Box was home-made and built during September 2020.
I copied exactly the same approach as for the hedgehog nest box, same wood, 15mm ply again from the local hardware shop who cut everything for me. Again I didn’t treat the box with again product that might discourage the hedgehogs.
I think it would still be a good idea to cover the roof but I still don’t have any suitable material, ideally some off cut roofing felt. In the meantime I’ve actually covered the nest box roof with an old plastic compost sack. This could be a good temporary approach here.
The design of the box is shown below.