The growth of out-of-town supermarkets is creating inner city 'urban food deserts', Canadian researchers have claimed.

Researchers from the University of Ontario found residents in several areas of Ontario had limited access to supermarkets and because they shopped locally, paid almost twice as much as those who shopped in the supermarkets.

“Poor people with no cars can be severely adversely affected by living in food deserts and are more likely to suffer from bad health and low quality of life,” said Jason Gilliland, author of the report.