After further conversion by the Royal Navy in October 1943, into an assault carrier, the ship was active in the Mediterranean, and later the war in the Pacific.

There was a ships complement of 646 men, who lived in crew accommodation that was significantly different from the arrangements that were normal for the Royal Navy at the time.

The separate messes no longer had to prepare their own food, as everything was cooked in the galley and served cafeteria style in a central dining area.

Power was provided by two boilers feeding steam to a turbine driving one shaft, giving 8,500 bhp (6,300 kW), which could propel the ship at 18 kn (33 km/h; 21 mph).

[13] The anti-submarine aircraft employed were initially the Fairey Swordfish and later the Grumman Avenger, which could be armed with torpedoes, depth charges, 250 lb (110 kg) bombs or RP-3 rocket projectiles.

Attacker's first active service in the Atlantic was to provided anti submarine cover during her crossing from the United States to Great Britain.

[4] Attacker transferred to the Mediterranean theatre reaching Malta, 7 September 1943 as part of "Task Force 88", consisting of the escort carriers Battler, Hunter, Stalker, the aircraft repair ship Unicorn, the cruisers Euryalus, Scylla, Charybdis, the destroyers Cleveland Holcombe, Atherstone, Liddesdale, Farndale, Calpe, and the Polish destroyers Ślązak and Krakowiak to providing cover for the Allied amphibious landings on mainland Italy, near Salerno, in Operation Avalanche.

[4] Attacker joined Convoy MK 24, along with Hunter and Stalker, to escort it from Gibraltar to the Clyde, from 17 September to 6 October 1943.

[4] Attacker, along with Hunter and Stalker, were ordered to Scapa Flow, arriving on 5 May 1944, for participation in Operation Hoops scheduled for 8 May.

[4] On 14 May, the three ships set out for the Mediterranean as additional escorts for the Convoy KMS 51, which had departed Liverpool, the previous day.

Attacker had completed 106 ground strike, bombardment spotting for Aurora, tactical reconnaissance missions and 120 bombing sorties.

[4] Attacker, along with Hunter and Stalker, set sail for the United Kingdom, on 31 October 1944, having been picked for service with the East Indies Fleet.

[4] Attacker was assigned to 21 ACS, but due to defects discovered during her transit to the Pacific Theater, she was deemed unfit for operation.

During May, and part of June, Attacker and Hunter were assigned to aircraft transport duties between India and South Africa to Ceylon.

[4] After a couple of training periods during June and July with 879 NAS she was allocated to Task Force 61 to participate in Operation Carson, attacks on Japanese shipping and airfields in the Penang and Medan areas of Sumatra.

They were ordered to return to Trincomalee, arriving 15 August, where they received the Station General Message, "SUSPEND OFFENSIVE OPERATIONS AGAINST JAPANESE FORCES."

[4] In September 1945, Attacker was present at Singapore, as part of Operation Tiderace, sailing immediately afterwards for Clyde, to de-store and enter reserve.

[4] Attacker was awarded Royal Navy honours for her contribution to the Battle of the Atlantic (1943–44), for support to the Salerno landings (1943), and to the South France and Aegean campaigns in 1944.

During the conversion to a passenger liner the ship was renamed Fairsky and was operated by Vlasov's Italian managed company, Sitmar Line.

[19] On completion of the refurbishment in June 1958, the "new-look" vessel began a long career as a migrant-carrying ship, which was to last until 1974, with the final migrant voyage from Southampton to Auckland.

[20] Having been reprieved from going straight to the breakers, in 1978, work began to convert the vessel to a static floating hotel and casino named Philippine Tourist.

However, the ship was badly damaged by fire on 3 November 1979, and subsequently scrapped in Hong Kong, the hulk having arrived there under tow on 24 May 1980.