Pauline Quirke's son Charlie hopes to 'make mum proud' when he runs his first London Marathon this month to raise funds for Alzheimer's Research UK following her dementia diagnosis. The cruel condition increasingly robs sufferers of their memory and ability to carry out everyday tasks. Almost one million people in the UK have the disease, with Alzheimer's being the most common type. The actor, 31, is determined to help find a cure by taking on the gruelling 26.2-mile race on Sunday, 26 April,