Those are Riverside Woodcraft hoggie buildings, my lot have two of their houses in the “wild” corner of the garden. Very solid, very good quality indeed, proper luxury bungalows for upwardly mobile hedgehogs complete with concierge service (i.e. me).
If you’ve got any hogs in the area at all then do please keep putting food out and the little tinkers will find it. It’s quite possible to have visitors leaving no trace of their presence at all apart from clean dinner plates!