The father of British teenager Hannah Smith, who took her own life after allegedly being bullied online, said it was "scary" he was not surprised by a survey that suggested 69% of young people have been cyberbullied.
Dave Smith said he was expecting the figures "to be a little bit higher".
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More than 80 prominent Britons, including Boris Johnson, Russell Brand and former Government ministers, urge Obama to release Aamer.
Thundery overnight with a Met Office warning for rain in place for a large swathe of the country. Quite sunny throughout tomorrow.
Video shot in Islamic State capital Raqq purportedly shows at least two of three missing London schoolgirls.