London, Jumada II 13, 1436, Apr 2, 2015, SPA -- Seven British political parties will get the chance to promote themselves to British voters late Thursday, joining a two-hour live debate in front of an expected television audience of up to 10 million people, dpa reported. After days of wrangling over the format - including a back-and-forth in which opposition Labour leader Ed Miliband challenged Conservative Prime Minister David Cameron to a bilateral debate - Cameron finally said he would only take part in a single debate including the seven parties. The five smaller parties have all suggested they could consider a formal or informal alliance with either the Conservatives or Labour, subject to their demands being met. -- SPA 20:36 LOCAL TIME 17:36 GMT www.spa.gov.sa/1345442