The tunnel featured on the BBC news today. Watch the news item at the following link:
I've also spoken to another previous owner of the property since the last update, together with an ex bomb disposal officer who worked in the Island. They had some interesting things to say, but as it's late and I'm pretty tired, I'll do an update on what they said next time.
Thanks too to all those who offered explanations about the ammo crate. Obviously that can be safely ruled out of the WW2 investigations!