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Roxy Longworth, who spoke to the BBC alongside Ms Ghey, was coerced into sending nude pictures to a boy at school when she was just 13, and subsequently experienced serious mental health problems.

Ms Longworth said she wanted to bridge the growing "generation gap" around social media.

On Wednesday, Johnson approved her request, giving her an office on the first floor of the Longworth House Office Building.

Yostin Andres Mosquera, of Scotts Road, Shepherd’s Bush, west London, is accused of murdering Albert Alfonso, 62, and Paul Longworth, 71, between 8 and 10 July in the London borough of Hammersmith and Fulham.

The two victims have now been named as Albert Alfonso, 62, and Paul Longworth, 71.