Supermarket convenience store shoppers ‘spending £320 more a year on groceries’

Shoppers using supermarket convenience stores could potentially end up spending around £320 more a year on groceries, according to Which? (KIrsty O’Connor/PA)
Shoppers using supermarket convenience stores could potentially end up spending around £320 more a year on groceries, according to Which? (KIrsty O’Connor/PA)