Wonder who lives here...

Had a trip to the market for bread, and wandered back through the Northumberland Park - they are doing lots of renovation and refurbishment at the moment. We did a double take as we passed this tree and saw the little door in the trunk... and there was another just a few yards further on... A veritable estate for wee woodland folk! Had intended to blip another sea view, but this little door trumped everything... we did knock, but no-one was home...