The ship would have been the Argentine navy light cruiser General Belgrano, which was hit by two Mk.8 torpedos from the British SSN HMS Conqueror, in the only known instance of a SSN firing a torpedo in anger. She started life as CL-46 USS Phoenix, launched at the New York Shipbuilding Corporation in March 1938.
When the ship went down, she took 321 crew and two civilian contractors with her.
Other ships to be sunk in the Falklands war were:
ARA Santa Fe (one casualty)
HMS Sheffield (20 casualties)
HMS Coventry (19 casualties)
HMS Antelope (2 casualties)
HMS Ardent (22 casualties)
RFA Sir Galahad (48 casualties, mosty members of the Welsh Guards)
MV Atlantic Conveyor (12 casualties, including her captain).
As to British warplane sales to Argentina scuppered by the Falklands conflict - well, there weren't that many British (as opposed to Multi-national with British involvement) multi-engined combat aircraft programmes in the late 1970s/ early 1980s. We actaully did sell them some Lynx helos, for use on their Type 42 destroyers - were we planning to sell them Nimrods?
Cheers,
Chris.
Cute and cuddly, boys, cute and cuddly!