The parents of a 17-year-old boy with severe epilepsy will join 15 other families in Westminster to call for more access to medical cannabis.

It was legalised in November but Rachel Rankmore said her son Bailey has been denied the more potent cannabis oil.

He has been taking non-psychoactive CBD oil for three years but she said doctors have refused to prescribe him the stronger, full extract oil.

Ms Rankmore said the refusal had made the family anxious and unwell.

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