The intercommunal violence in Cyprus prompted Turkey to transmit a diplomatic note to the British government, which invited the Turkish and Greek governments to a conference in London, which started on August 26. The day before the Tripartite London Conference (29 August–7 September 1955) began, Prime Minister Menderes claimed that Greek Cypriots were planning a massacre of Turkish Cypriots. Sensing an opportunity to temper Greek demands, Prime Minister Harold Macmillan advised the Turkish delegates that they should be stern. Turkish Foreign Minister Fatin Rüştü Zorlu launched a harsh opening salvo, stating that Turkey would reconsider its commitment to the Treaty of Lausanne unless Greece reconsidered its position on Cyprus. The Greek delegates, surprised by harshness of the speech, backed down during the negotiations, although they did not abandon the idea of "enosis" with Cyprus.