Open drains and steep sided ditches are extremely dangerous. Newly dug footings can attract hedgehogs due to the likely presence of unearthed invertebrates, but they can easily fall in and be trapped by the sheer, steep sides. Please ensure all drain covers are correctly fitted and regularly check drains, trenches, and garage inspection pits to make sure that no hedgehogs are trapped. Provide escape routes such as rigid steel mesh, to act as a ladder, or a plank of wood, but be careful that the angle is not too steep.
Grace says, “keep drain holes covered” for this not only stops leaves and debris blocking your drains but, more importantly, stops me from falling in.