Do you remember last year when my living roof was trashed? We thought the culprit could have been a wood pigeon as we set up a wildlife trap camera and the birds most likely were a wood pigeon or blackbird. The camera caught both stomping across the plants. This year we have conclusive proof as Martyn spotted the wood pigeon poking about and turfing bits of plant aside.
When I planted up the lid all the plants had their own space