The Seafang was essentially a Spiteful redesigned for RN Carrier use, with the addition of an arrester hook, folding wings and contra rotating twin propeller to eliminate torque effects.
The first Seafang flew in 1946; it was the first interim production Mark 31 VG471. Although 150 of the interim variant were ordered, only nine were completed before the order was cancelled as the urgency of an interim type was removed due to the end of the war.
Seafang Mark 31 VG474 was used as a development aircraft for the Supermarine Attacker including the fitment of power-operated ailerons and contra-rotating propellers. The Attacker was a jet-powered development of the Spiteful/Seafang design which used the Spiteful laminar-flow wing and landing gear.