LPP was led by Dr. Wijeyananda Dahanayake.
In the 1960 elections LPP was part of the 'Mahajana Eksath Peramuna' coalition, consisting of the Sri Lanka Freedom Party, Viplavakari Lanka Sama Samaja Party, Jathika Vimukthi Peramuna and LPP.
[1] Ahead of the 1965 elections the link between LPP and SLFP had been broken.
After the elections LPP gave their support to the United National Party government.
This article about a Sri Lankan political party is a stub.