Country of build:
- Rolls-Royce PWR3 nuclear reactor, turbo-electric drive, pump-jet
Limited only by food and mechanical components
- 4 * 21 inch (533 mm) torpedo tubes for: Spearfish heavyweight torpedoes
- 12 * ballistic missile tubes for:
- 8-12 * Lockheed Trident II D5 SLBMs (carrying up to 8 warheads each)
HMS King George VI will be the fourth boat of the Dreadnought-class submarine class.