Fred Robinson, 26, of The Grange, Grantham, had been speaking on the phone with a family member who was being treated when he became abusive at around 7.35pm on 22 April.
A nurse had intervened on behalf of the patient and was threatened with violence by Robinson over the phone before the call ended.
Around 20 minutes later – outside of the usual opening hours for the A&E department – he arrived at the ambulance entrance to the hospital and withdrew a baseball bat from a backpack and used it to smash the glass in the doors while shouting and swearing. He also kicked the doors.
Staff secured the other entrance and evacuated patients to a place of safety.
When police arrived, Robinson threw the bat at officers before they used Tasers to make the arrest. Upon being searched, officers found a knife in his trousers.
Thankfully, nobody was injured in the incident.
Robinson was sentenced to 14 months in prison for affray at a hearing at Lincoln Crown Court on Wednesday, 27 June. He was also given concurrent sentences of 10 months for possession of a knife/ pointed article, six months for possession of an offensive weapon in a public place, and two months for criminal damage.
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