A fifth set belonged to the Megalosaurus, a ferocious 9-meter predator that left a distinctive triple-claw print and was the first dinosaur to be scientifically named two centuries ago.

Moran and Reyes had sailed an RHIB (rigid-hulled inflatable boat) from the Hessle slipway before returning hours later with the drugs haul and unloading it at a beach near Easington caravan park.