Shop adverts warning

Supermarkets were warned yesterday to rein in the claims they make about each other's prices by the advertising watchdog.

Sainsbury, Asda, Tesco and Safeway all have complaints about each other's adverts in the latest bulletin from the Advertising Standards Authority. Only one complaint against Tesco has been upheld, and the ASA is warning shops to check their facts before launching an attack on their rivals.

It also warns them to take care that goods they compare with competition are not short-term offers.

- Paul McCann