Loch Tay, and the kind of view that draws people to Scotland. But the landscape isn’t the main attraction for archaeologists Nick Dixon and Barrie Andrian, who are much more interested in what they can see in the shallow waters around the edge of this loch. They’re carrying out the first ever underwater excavation of a crannog, an artificial island built in the Iron Age. A structure that’s now completely submerged, but originally would have looked something like this. This full-scale reconstruction was built as an experiment based on timbers discovered so far. But ideas could change as new discoveries are made. But what makes Oak Bank crannog so important is that the preservation underwater is fantastic, all sorts of clues to life in the Iron Age are being discovered here. Unique 2500 year old wooden objects that only survive underwater. Not surprisingly, digging a site as rich as this has become a kind of obsession. Nick’s been diving here most summers since 1980. This sum