HMS Attacker was the lead ship in the Attacker class of eight escort carriers, just one of the 38 escort carriers built in the United States for the Royal Navy during the Second World War [REF].
The ships armament concentrated on anti-aircraft (AA) defence and comprised two 4 inch dual purpose, AA guns in single mounts, eight 40 mm AA guns in twin mounts and twenty-one 20 mm AA cannons, in single and twin mounts [REF].