Andrew Sheridan is one of a number of chefs who say complaints and threats have severed the trust between restaurants and customers

Restaurant owners are abandoning the age-old “customer is always right” maxim because too many diners try to get freebies through threats, making malicious complaints and underhand tricks.

Andrew Sheridan, cited as “one of the finest chefs north Wales has ever produced”, said he was tired of customers “trying it on”.