Dr Brett Scott, who has led research into the care of spiral injury victims, has told ITV News Government action is needed to stop patients entering a spiral of depression because of ineffective care home placements.
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A man, reportedly armed with a knife and a baseball bat, was detained close to the event and police cleared the area as a precaution.
A remarkably mild night
Thousands of people have gathered in the centre of Manchester for a vigil in the wake of the terror attack.