Henry again!

Henry only has to watch something once, and knows how to do it! He can therefore get through almost any gate, including the stair gates, and open/close the shutters which he delights in doing again and again!
We've been clearing out the building at the end of our garden, referred to as the Batcave for the last ten years, only to find that it has no bats! First we were going to knock it down and build another, then we decided to just repair the roof, now we are undecided, but need to do something before it falls down!