LONDON - British opposition leader David Cameron promised on Friday that if elected he would reduce public sector pay disparities, stepping up his efforts to wrest wavering voters away from the ruling Labor Party.

Bidding to lead his Conservative Party back to power in a May 6 election shaping up to be a tight race, Cameron also sought to press home what he sees as his advantage on economic policy, insisting his plans to cut public spending were solid.

The Conservatives are ahead in the polls but not by a big enough margin to be sure of winning an overall majority in parliament. If they fall short of that goal, a variety of outcomes are possible including another Labor government.