article_snippet.sent: A quarter of an hour later, Norfolk Police were alerted by a member of the public to a man brandishing a knife demanding cash from staff working at the supermarket giant's King's Lynn branch.
article_snippet.sent: Norfolk Crown Court heard that officers also recovered a knife.
article_snippet.sent: Last month, the 31-year-old, of Gaywood, King's Lynn,admitted robbery and carrying a knife as an offence.
article_snippet.sent: Norfolk Crown Court heard how armed police were deployed after the alarm was raised.
article_snippet.sent: Another count of robbery relating to the car-jacking was left to lie on file, Norfolk Police said.
article_snippet.sent: A member of the public alerted police to a man threatening a member of staff in the store (pictured)