A campaign is being stepped up for legislation to protect shop workers from rising levels of violence, abuse and assaults.
Alex Norris - the Labour MP for Nottingham North - is set to put forward a private member's bill following an industry survey which revealed incidents have increased to more than 400 a day.
The Co-op said its latest data showed a four-fold increase in violent incidents and abuse in its stores since 2017.
A Freedom of Information request by the Co-op revealed two out of every three incidents reported in its stores do not lead to the police attending.
Mr Norris said: "If we give shop workers responsibilities to uphold the law on sales of a range of products which Parliament has determined can only be sold to people above a certain age, then shop workers should be afforded protection in carrying out those public duties.
"The bill appeals for a reset in society, with a very clear message sent that it is not part of the job for shop workers to suffer abuse and violence and Parliament establishing a new expectation by legislating for what is acceptable and, the police given the resources to implement this new legislation."