Douglas Price with semi-submarine on Longleat lake.
Longleat House, Wiltshire.
Newspaper cuttings on file.
Various shots as semi-sub inventor Douglas Price puts his craft through its buoyancy tests on the half mile lake in the grounds of Longleat House. He hopes, if successful, to cross the Atlantic in it. Various shots interior the cockpit of the sub. showing dials etc. and the B.M.C. lorry engine that drives the craft. Various shots of the sub. at speed across the lake with Longleat House in background of some shots.