[4] As of 2011, the four main supermarket chains (Asda, Tesco, Sainsbury's and Morrisons), Marks & Spencer, The Co-operative, Bargain Booze and Waitrose all apply the Challenge 25 policy.
Some have further rules, such as requiring ID from all members of a group in order to proceed with the sale (leading to adults well over 25 sometimes being refused service when shopping with a younger partner, friend or child).
Furthermore, some supermarkets have trialled a policy of asking all alcohol purchasers for ID irrespective of apparent age, which has led to senior citizens as old as 86 being refused service.
[citation needed] In many of the large supermarket chains, including Marks & Spencer, The Co-operative and Waitrose, a shop assistant found selling alcohol to an underage person is liable to severe punishment by their employer, including possible dismissal, in addition to the standard legal penalties.
Other off-licences such as the food halls of Selfridges and Harvey Nichols, Spirited Wines, and the long established shops around Soho are not currently members of the RASG.