A Kent MP is urging the chancellor to invest more in the fight against the country’s leading cause of death ahead of tomorrow’s budget. Jim Dickson, who represents Dartford at Westminster, has called for action after his own mother’s dementia diagnosis left his family “shocked” and “fearing the worst”. Speaking to KentOnline, the Labour politician said Judy had begun experiencing memory loss and behaviour in herself that was “unusual”. Following intervention from his father William and her GP, and several tests later, she was diagnosed with dementia. Mr Dickson said: “I know my mother and my d…