David Miliband launched his bid to succeed Gordon Brown with a pledge to 'rebuild' Labour. The former Foreign Secretary was first out of the blocks in the race for the leadership - declaring his hand just 22 hours after Mr Brown quit. Mr Miliband, 44, is seen as the standard bearer of the Right and declared he could 'lead Labour to rebuild itself as the great reforming champion of social and economic change'. Flanked by 15 Labour MPs, he said the party needed to act 'urgently', adding: 'We live in a new political world, and the responsibility of office may return sooner than people think'. Mr Miliband will officially launch his campaign in his South Shields constituency next week, but he will begin travelling around the country tomorrow, focusing on those areas which deserted Labour at the General Election.