Two prototypes (serial numbers P1767 and P1770) based on the Fairey Type 100 design.
First production version, Rolls-Royce Merlin 30 engine with 1,260 hp (940 kW), 30 built
Upgraded Merlin 32 engine with 1,640 hp (1,225 kW), four-bladed propeller, ASV II radar, 1,688 built
Anti-submarine warfare version of Mk II with ASV III radar in a blister under rear fuselage, 852 built
Mk II (number P9976) fitted with a Rolls-Royce Griffon engine with 1,850 hp (1,380 kW), first flight 11 November 1944, abandoned in favour of Fairey Spearfish.
Griffon 37 engine with 2,020 hp (1,510 kW), payload increased to 2,000 lb (910 kg), ASH radar under the left wing, revised tailfin, 37 built