Piłsudski's regime and jailed in the infamous Bereza Kartuska prison. The party was a member of the Labour and Socialist International between 1923 and 1940. The party supported the Polish resistance during as the underground Polish Socialist Party – Freedom, Equality, Independence (Polska Partia Socjalistyczna – Wolność, Równość, Niepodległość). In 1948 it suffered a fatal split, as the Communists applied the salami tactics to dismember any opposition. One faction, which included Edward Osóbka-Morawski wanted to join forces with the Polish Peasant Party and form a united front against the Communists. Another faction, led by Józef Cyrankiewicz, argued that the Socialists should support the Communists in carrying through a socialist program while opposing the imposition of one-party rule. Pre-war political hostilities continued to influence events, and Stanisław Mikołajczyk, leader of the Peasant Party, would not agree to form a united front with the Socialists. The Communists played on these divisions by dismissing Osóbka-Morawski and making Cyrankiewicz Prime Minister. In 1948, Cyrankiewicz's faction of Socialists merged with the Communist Polish Workers' Party (PPR) to form the Polish United Workers' Party (Polska Zjednoczona Partia Robotnicza; PZPR), the ruling party in the People's Republic of Poland; remnants of the other faction survived on emigration in the Polish government-in-exile and because of that Polish Socialist Party was still active on emigration. Cyrankiewicz's faction isn't really treated as proper PPS. A new party of the same name, which seeks to carry on the tradition of the original PPS, was established by left-wing opposition figures such as Jan Józef Lipski in 1987. However, the new PPS remains a marginal group within the political landscape of the Third Republic, having representation in the Sejm only between 1993 and 2001. However, in the 2019 Polish parliamentary election the PPS saw its leader Wojciech Konieczny elected to the Senate of Poland under the banner of The Left. Other members of the Sejm and the Senate later joined the PPS, which currently has two deputies and two senators. Its main propaganda outlet was the Robotnik ('The Worker') newspaper. The current party published the Nowy Robotnik ("The New Worker"), a continuation of the original publication, from 2003 to 2006. On 16 November 2020, the party founded its first foreign branch in the United Kingdom, in the city of Coventry, home to a British Polish population founded by Polish Army Exiles. On the 25 June 2022, the party formed an alliance with the