While digging out an 8 year old compost heap (the things you inherit on an old plot!) I discovered a void. It was in the base of the heap, which was about 1m deep overall, about 300mm diameter and 200mm high with a slightly domed "ceiling". I could not see any obvious access or exit although I may have already dug that out. There was no sign of life but there was a slight hollow about the size of my fist in the floor of the "nest" which was filled with short pieces of grass about 50mm long. I am puzzled about what could have made the "nest". The plot is at the back of some buildings but on a site that has not had much activity over the past 3 or 4 years.
Any ideas please?
Any ideas please?
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