Claire Shortland who is 24 and from Derby, is working for charities helping young people who self-harm as a way of aiding her own recovery.
She explains it's not always possible to know why self-harmers do it.
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The wheelchairs are specially adapted for disabled children to use during sport and exercise and are a lifeline for those who use them.
The Police Service of Northern Ireland and the Met Police have been asked for any information that they had advanced notice of the attacks.
Storm Doris bringing heavy rain and gales.