A small number of protesters and police officers were injured during today's demonstrations - with one police officer taken to hospital with a head injury. He has been discharged this evening after treatment.
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It comes after months of protests following United Lincolnshire Hospitals NHS Trust's (ULHT) decision to close the unit overnight.
The attacker made a swipe at her handbag, causing the victim to lose balance and fall to the floor.
The assault is alleged to have taken place more than two years ago in Birmingham.