The party will also pledge to build 1.5 million homes and overhaul the planning system to deliver more action on housing. But the Conservatives say Labour's "tax raid" will "punish first-time buyers".
Labour to offer 'freedom to buy' for young people with mortgage guarantee scheme coastfm.co.uk - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from coastfm.co.uk Daily Mail and Mail on Sunday newspapers.
In her first major speech of the election campaign, the shadow chancellor will attempt to woo companies by promising her "changed" party will run "the most pro-growth Treasury in our country s history".