Hi Matt,
This is really getting on my......nerves, the first time it happened put it down to bad luck, second time I tried getting up early, early and keeping a watch but there's quite a long time between the issues, would had to get up early for about six months after the second time
.
Thought about a web cam but would need to be able to go back over the nights activity, Harry's camera seemed an idea.
Don't really know what's available, best for the situation.