DR Harash Narang headed a convoy of tractors which passed through Byker yesterday as he pushed his campaign to unseat Agriculture Minister Nick Brown.
Dr Narang, who is standing against Mr Brown in Newcastle East, has been a stern critic of Mr Brown's handling of the foot-and-mouth crisis.
Dr Narang worked at the Public Health Laboratory Service in Newcastle until 1994 when he says he was sacked for making the link between BSE and the illness CJD in humans.
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