, leader of the IWBP. The party was established in February 1967 by
Robert Peliza, a former member of the
Association for the Advancement of Civil Rights (AACR), calling for full integration with the
United Kingdom, including direct parliamentary representation in Westminster. After Alfred Gache, a member of the Isola Group, defected to the AACR on 1 June 1972, the IWBP could no longer command a majority, and thus could not form a government. Peliza dissolved the
House of Assembly and called
early elections on 23 June. Although the IWBP won seven seats, it was defeated by the AACR, which obtained eight seats and 52% of the vote, while the Isola Group disbanded with both
Peter and William Isola joining the IWBP. The results returned
Joshua Hassan to power, leaving Peliza as Leader of the Opposition. In October 1972,
Maurice Xiberras took over as party and opposition leader. Despite this, in early 1976 a cross-party Constitution Committee was established in Gibraltar to discuss and plan for constitutional changes involving the further integration of Gibraltar with the United Kingdom. Joshua Hassan and Maurice Xiberras visited
London in June 1976 as delegates of the Constitution Committee, but were unable to convince the British Government to support their proposals, leading Hattersley to issue a
memorandum rejecting the proposals on behalf of the Government. As a result of the British Government's clear repudiation of their entire ''raison d'être'', the IWBP was dissolved shortly before the
1976 elections. The AACR won eight seats (with a personal vote of 75.3% for its leader Hassan) and returned to power, although Xiberras was elected as an independent. ==Other former IWBP members==