Trends over time In the last decade, cases have risen by 49% in the UK. Rates of mouth cancer has increased by an astonishing 135% over the last 20 years (England data only). The latest research says that deaths from mouth cancer in the UK have increased by 21% compared with five years’ ago. In Scotland alone there has been a 52% increase in the number of men dying from mouth cancer compared to 10 years ago.