Did Margaret Thatcher offer Falklands leaseback?

Did Margaret Thatcher offer Argentina a leaseback arrangement for the Falkland Islands?

No. Leaseback ideas circulated within the Foreign Office and Alexander Haig's shuttle diplomacy, but they were not Thatcher's offer and neither belligerent accepted Haig's version.

A proposal discussed inside a government does not automatically become the leader's policy. British officials considered numerous ideas before and during the crisis, while Alexander Haig advanced leaseback concepts during his shuttle diplomacy. Thatcher did not make the offer attributed to her, and both sides rejected the relevant American proposal. Once Argentina invaded, the British government was politically cornered into recovering the islands even though a negotiated transfer might have been easier to contemplate beforehand.