Greenhouse home to wood mice

The greenhouse has long been overdue a massive clear-out and renovation (the former being easier than the latter due to lack of enthusiasm by various tradespeople to do greenhouse repairs - offers welcome!) so I began a couple of weekends ago. How does one accumulate so many old flowerpots and chairs? I appear to have seven garden chairs, yet seldom use more than one!
I am thinking to get some proper staging installed after years of making do with old planks etc.. In removing some of these to clean I noticed a pile of rubbish which, in my clean-up mode, I failed to question. Why would there be a pile of rubbish UNDER a plank of wood. A little prodding later I realised it must be a wood mouse nest. There have been plenty around and I soon identified runs tunneled through the soft earth. Perhaps this also explains some of the bits of concrete which seem to have come away from the footings. I am still happy to welcome the little fellows though. I don't think they alone will demolish a greenhouse.