LONDON (Reuters) - Britain's party leaders campaigned around the clock Tuesday in a final push for votes, two days before a parliamentary election that opinion polls suggest could redraw the political map.

Prime Minister Gordon Brown hinted that he could step aside if his Labor Party fails to win a fourth consecutive election Thursday, as most polls suggest.

Recent surveys have indicated that David Cameron, hoping to end his center-right Conservative Party's 13 years in opposition, would either win a slim majority in parliament or fall just short of it.