Inside the secret facility producing Britain’s newest stealth submarines. A hull is tested in the 885ft-long Shiphall Two tank at QinetiQ’s facility near Portsmouth A model ship is tested in the 885ft-long Shiphall Two tank at QinetiQ’s facility near Portsmouth. Tom Cotterill Defence Editor. Daily Telegraph. https://ift.tt/Ec0FowP https://ift.tt/wZ5dhCp