At current trends, new cancer diagnoses will jump by a third by 2040, to exceed 500,000 a year, according to Cancer Research UK. And though survival rates for some cancers have improved, deaths are set to rise by nearly a quarter, from 167,000 a year to 208,000. Much of the rise in cases is due to the ageing population, the charity said, but smoking and obesity levels are still major contributors; around four in ten cancers are believed to be preventable. The charity said that to avoid the NHS being “overwhelmed”, the Government must invest more in preventative measures; ensure cases are diagnosed and treated faster; and recruit more specialist staff. “It takes 15 years to train an oncologist, pathologist, radiologist or surgeon,” said Prof Charles Swanton, its chief clinician.…