Alacrity participated in the Falklands War, departing Devonport on 5 April 1982 and captained by Commander Christopher Craig. Alacrity was slightly damaged by an Argentine bomb on 1 May 1982. On the night of 10-11 May 1982 Alacrity was tasked to establish if the Argentines had mined the north entrance of Falkland Sound. While approaching Swan Islands, she engaged and sank the 3000 ton Argentine supply ship ARA Isla de los Estados with her 4.5-inch gun. The Argentine transport blew up after a hit ignited her cargo of jet fuel and ammunition. Fifteen crew members and seven servicemen were killed, there were only two survivors. As Alacrity left the channel just before dawn, her sister ship was waiting to accompany her back to the Task Force, when the Argentine submarine, Captained by Fernando Azcueta fired two SST-4 torpedoes at a range of 5000 yards. One didn't leave its tube, the other missed and was heard to detonate after hitting the sea bottom. On 25 May, Alacrity sustained damage to her bow, while rescuing survivors from the which had been struck by two Exocet missiles.
1982–1994
As with the other surviving Type 21 frigates, Alacrity was suffering from cracking in her hull by the mid-1980s. She was taken in for refitting, and a steel plate was welded down each side of the ship. In 1989, while deployed as West Indies guard ship, Alacrity was tasked for humanitarian relief on the island of Montserrat in the British West Indies after the island suffered devastation in the wake of Hurricane Hugo. The ship's Lynx helicopter was the sole means of transporting aid ashore as the port was destroyed.
Alacrity was decommissioned and transferred to Pakistan on 1 March 1994, being renamed Badr. Exocet was not transferred to Pakistan and Badr had her obsolete Sea Cat launcher removed and replace with a Phalanx CIWS. Signaal DA08 air search radar replaced the Type 992 and SRBOC chaff launchers and new 20 mm and additional 30 mm guns were fitted. Between 11–21 May 2008, Badr participated in Exercise Inspired Union, a multi-national exercises in the North Arabian Sea. Other Pakistani warships included the frigate Shah Jahan and the replenishment tanker Nasr, as well as the Pakistan Air Forceexplosive ordnance disposal team, and the American destroyers and. Badr was decommissioned in April 2013 by the Pakistan Navy.
