OBR says Budget leak 'worst failure' in its 15-year history

Archie Mitchell,Business reporterandFaisal Islam,Economics editorGetty ImagesChair of the OBR Richard Hughes has said he was "personally mortified" by the mistakeThe Office for Budget Responsibility (OBR) has said the early publication of a key Budget document was the worst failure in its 15-year history but it was inadvertent. The UK's official forecaster confirmed the market-sensitive report was accessed 43…