article_snippet.sent: Andrew Hennells, pictured, posted a message on Facebook admitting Andrew Hennells plans to rob a Tesco supermarket 15 minutes before holding up staff .
article_snippet.sent: A man who boasted about plans for an armed robbery on Facebook minutes before A man who boasted about plans for an armed robbery on Facebook minutes before he threatened staff in Tesco threatened staff in Tesco has been jailed for four years.
article_snippet.sent: Andrew Hennells posted details of Andrew Hennells plan to the social networking site - stating Andrew Hennells was 'Doing.
article_snippet.sent: Sentencing him to four years in prison for armed robbery today, judge Anthony Bate said Hennells posed a 'high risk of serious harm to the public'.
article_snippet.sent: Hennells posted this message only 15 minutes before threatening staff at Tesco's in King's Lynn .
article_snippet.sent: Hennells held up staff at the Tesco store in King's Lynn, pictured on Friday, February 13 . '
article_snippet.sent: Hennells made a series of other posts to Facebook in the hours before the robbery, including a picture of a large knife, and sharing a Bare Knuckles Gypsies' 'The hardest man in Ireland' video.
highlights_snippet.sent: Andrew Hennells threatened staff in Tesco with a knife of February 13 .
  
highlights_snippet.sent: Fifteen minutes before the raid Andrew Hennells posted details of Andrew Hennells plan on Facebook .
  