An underwater camera set up 55 years ago to try and photograph the Loch Ness Monster has been found by accident by a robot submarine.

The ocean-going yellow sub - called Boaty McBoatface - was being put through trials when its propeller snagged the mooring for the 1970s camera system.

It is believed it was lowered 180m (591ft) below the loch’s surface by the Loch Ness Investigation Bureau, a group set up in the 1960s to uncover the existence of Nessie in the waters.

No footage of Nessie has been found on the camera, but one of the submarine’s engineers was able to develop a few images of the loch’s murky waters.