Attlee's announcement The Prime Minister of the United Kingdom announced on February 20, 1947 , that the British Government would grant full independence to British India by June 3, 1947. The future of the Native States would be decided after the final transfer date was decided. [1 ] Attlee wrote to Mountbatten on 16 March: "Of course , it is important that the Indian states align their relationship with the authorities , with the aim of transferring power to British India ; Not intended to bring about universality as a method , to reach a decision before the date of final transfer of power , but you are permitted , as you see fit , to negotiate with individual states to adjust their relations with the Crown. From the orders and agreements of the British rule Will remain They may join or separate the two kingdoms. "[2] Plan of 3 June The plan of 3 June was also known as the Mountbatten Plan . The principle adopted by the British government would be to give successor governments the status of sovereignty. Both countries would have autonomy and sovereignty to form their own.