Tesco under-fire for offering loyal consumers discounts on wine.
The Common's home affairs committee criticised Tesco for offering discounts to customers who buy large quantities of wine, during its 'Surveillance Society' inquiry.
The supermarket routinely sends out wine coupons which give money off bottles of wine to loyalty-card holders.
John Denham, chairman of the committee, said the supermarket giant was "irresponsible" in its marketing, which could lead to alcohol abuse.
"I don't quite see why Tesco should be trying to raise the consumption of high fat products, or high fat and salt or high alcohol products, because that is what somebody is already buying.
"Where does the level of responsibility beyond selling as much as you can of whatever harmful product it is the consumer is buying stop?
"I may be an alcoholic. It may be that sending me wine vouchers is not actually a particularly benign thing to do."