An underwater robot is trying to unlock the secrets of what lies in the depths of Loch Ness.

The torpedo-shaped drone has carried out the most in-depth survey of the loch in history.

Its findings add a new chapter to the 13-hundred-year-old story of the search for the Loch Ness Monster.

Researcher Dick Raynor is involved - and he's a Nessie sceptic: