It was initially formed in June 1945, for service in the British Pacific Fleet, until disbanding later that year, in the September.

[2] The Group reformed in October 1947, for embarkation on the lead ship of her class HMS Implacable.

Notably, an 849 NAS Grumman Avenger from Victorious, located and scored the first bomb hit on the Japanese escort carrier Kaiyo, at Beppu Bay, in Kyūshū, on 24 July 1945, which resulted in severe damage that kept the ship out of the remainder of the war.

[2] The 1st Carrier Air Group reformed in October 1947, for the name ship of her class, HMS Implacable.

The 1st CAG was made up of 801 Naval Air Squadron, which operated the de Havilland Sea Hornet, twin engine, fighter aircraft, and 813 Naval Air Squadron, which was equipped with Blackburn Firebrand, a British single-engine strike fighter aircraft.