Gary Brabin has been found not guilty of two counts of assault. He has been found guilty of one count of threatening behaviour and will receive a fine.
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Police have applied for extra security support for Radio 1's Big Weekend, which could mean armed officers patrolling the event in Hull.
Wendy Fawell was last seen in the foyer of the arena before the bomb blast that killed 22 people and left many more injured.
Friends of a York student who lost her parents in the Manchester terror attack have launched a crowdfunding campaign to support her family.