<sod >Mr Smith, who served as shadow work and pensions secretary under Mr Corbyn, willÃÂÃÂ declare his candidacy after he has spoken to members in his Pontypridd constituency, according to the BBC.< eod>< sod > Mr Smith, who served as shadow work and pensions secretary under Mr Corbyn, declared he would be a "radical and credible" leader who could take Labour back into power.< eod>