Budget 2012: five charts George Osborne needs to see

GDP forecasts always get it wrong Photograph: Guardian Photograph: Guardian

… and borrowing forecasts always under-estimate Photograph: guardian.co.uk

The national debt will keep rising until 2015-16 Photograph: Guardian Photograph: Guardian

The government has a big gap between what it has coming in in taxes - and what goes out in spending Photograph: Guardian Photograph: Guardian