A new war craft, the Thornicroft coastal motor boat, is tested on River Thames.
Full title reads: "Gravesend - Greenhythe".
Testing miniature war craft on River Thames. Kent.
Various C/Us of bits of new war craft, the Thornicroft coastal motor boat; it has twin torpedoes, machine guns, radio transmitters and depth charges. Various shots of the armoured motor boats speeding past industrial docks. It travels at 50 mph, making it the fastest war vessel.
Note: this item was originally part of NEWS IN A NUTSHELL.