This photograph showing British marines deployed in Grytviken, South Georgia near the Falkland Islands has been released by the National Archive under the 30-year-rule.
Other documents released reveal that the Americans wanted to inform the Argentinians that UK troops would be landing on South Georgia as part of its diplomatic peacekeeping mission.
The British ambassador to Washington, Sir Nicholas Henderson, succeeded in talking the Americans out of it.
A secret plot by Libyan dictator Colonel Muammar Gaddafi to supply arms to the Argentinian junta in the midst of the Falklands War was dramatically unmasked by British agents, according to newly published documents.
A British air attache discovered the Argentines were using the airport at Recife in Brazil as a staging post for shipping weapons from Libya.
The attache had a source at the airport who was able to board an Aerolineas Argentinas flight and saw for himself boxes apparently packed with missiles.
The British government decided to embarrass the Brazilians into halting the flights by leaking details through a third country, in order to protect the air attache's source.
Margaret Thatcher insisted on paying nearly £2,000 towards the search for her son after he went missing in the Sahara desert amid concerns of a public backlash over taxpayers' money being used, newly-released files reveal.
Mark Thatcher went missing for six days in January 1982 during rally, along with his French co-driver, Anne-Charlotte Verney, and their mechanic.
They were eventually found after a search by the Algerian military.
Records released for the first time to the National Archives show that Mrs Thatcher paid a total of £1,784.80 for the search operation to avoid any criticism over costs to British taxpayers.
The British government considered pulling England out of the 1982 World Cup as war broke out over the Falkland Islands, according to documents released by the National Archives under the 30-year rule.
In the aftermath of the Falklands conflict, sports governing bodies were urged to pull out of competitions with Argentinian teams because players might find it "difficult to meet Argentina on a sports field" if fighting was continuing.
But the documents show that cabinet ministers debated whether pulling out of the 1982 Football World Cup in Spain would send the right message.
In the end, England played and was knocked out in the second round.
US President Ronald Reagan issued a last-ditch appeal to Margaret Thatcher to abandon her campaign to retake the Falklands and to hand over the islands to international peacekeepers, according to official documents made public today.
Files released by the National Archives under the 30-year-rule show that Mr Reagan called the Prime Minister on 31 May 1982 as British troops were closing in on final victory.
"The best chance for peace was before complete Argentine humiliation," he told her, and urged her "to hand over the Queen's islands to a contact group".
Mrs Thatcher replied that she would not consider a ceasefire before the Argentinians withdrew from the Falklands.
Documents released by the National Archives under the 30-year-rule reveal that Margaret Thatcher's Attorney General, Sir Michael Havers, devised an elaborate plan to deceive Argentinian arms buyers in the run-up to the Falklands war.
Havers came up with the ploy in league with a friend in the air freight business in June 1982.
In a letter to Prime Minister Thatcher, he admitted himself that the idea was "more appropriate to a James Bond movie!"
The ploy involved approaching potential arms exporters with the offer of providing a freight service, and then redirecting the weapons to a safe location.
A letter from the late broadcaster Sir Jimmy Savile to the then-Prime Minister Margaret Thatcher has been released by the National Archives under the 30-year rule.
In the 1982 letter, Savile thanks the Prime Minister for a lunch he attended and even proclaims his love for her.
A British marine who fought in the Falklands war returns to meet an Argentine soldier whose camera he found thirty years ago.Read the full story ›