The agreement, signed on December 21, 1979.  Lord Carrington and Sir Ian Gilmour signed the agreement on behalf of the United Kingdom, Bishop Abel Muzorewa and Dr Silas Mundawarara signed for the government of Zimbabwe Rhodode and Robert Mugabe and Joshua Nkomo for the Patriotic Front. The Lancaster House Agreement, signed on 21 December 1979, declared a ceasefire and ended Rhodesian Bush`s war; and directly to the creation and recognition of the Republic of Zimbabwe. It demanded the imposition of a direct British regime, which put an end to Rhodesia`s unilateral declaration of independence in 1965. The British government would be strictly limited to the duration of a proposed election period; After that, independence would follow. It is essential that the political wings of the black nationalist groups ZANU and ZAPU, which led the escalating and increasingly violent insurgency, be able to stand in the next elections. But this was linked to the respect of the ceasefire and the confirmed absence of voter intimidation. Another dimension of the Prime Minister`s reconciliation policy was the request to Lord Soames, who managed the country during the three months of the transition period, to join him in leading the country to independence. As part of a gentlemen`s agreement, Lord Soames remained governor until 18 April 1980, when the Union ceded Jack to the Zimbabwean flag.
Lord Carrington, UK Foreign Minister, chaired the conference.  The conference ran from 10 September to 15 December 1979 with 47 plenary sessions. The answer is that Britain, when it embarks on an adventure inside, like other researchers, must face the dangers when they arrive. It will be able to obtain the support of neighbouring countries that have insisted and contributed to a settlement. As with any act of decolonization, what happens next can be planned and protected against it, but never controlled. (An impressive contribution by Mr. Nkomo to this conference was his insistence on a number of regulations that would work; not a sentence that could be rejected once on paper.) Although the British governor has control over everything that can be controlled, he will not be able to run the country like a two-month dictatorship. Blacks and whites in Zimbabwe will continue to have the power to break the agreement on the ground. Mugabe argues that the country remains a problem because of the constraints imposed by the Lancaster House Agreement of 1979 to end white rule in former Rhodesia and Britain`s betrayal of the promises it made to secure a solution.
Mugabe and Joshua Nkomo led the delegation of liberation fighters to the talks. From the beginning, Nkomo said that the return of the country to a majority was essential to his cause: “What will be the future of the country?” he asked the British. With the conclusion of this agreement and the signing of its report, the parties committed: forty years ago, on 21 December 1979, an agreement was signed at Lancaster House. This put an end to the illegal white-dominated regime dominated by Rhodesia since the Unilateral Declaration of Independence (IDU) in 1965 and inaugurated the newly independent state of Zimbabwe. The Lancaster House Agreement was an early diplomatic success for Margaret Thatcher`s new Conservative government and remains one of the most remarkable achievements of British diplomacy since World War II. On 16 November 1979, all-party talks negotiated by Great Britain at Lancaster House in London resulted in a peace agreement and a new constitution After the meeting of Commonwealth heads of government in Lusaka from 1 to 7 August 1979, the British government Mouzorewa and the leaders of the Patriotic Front invited a constitutional conference at Lancaster House.