ITV News understands troops drafted in to cover the shortfall in Olympic security, who are staying at Tobacco Dock in east London, are being forced to pay £1 to use showers at a public swimming pool opposite the temporary living quarters.
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Temperatures are predicted to reach a high of 23C.
Hunt accused companies of "turning a blind eye" to a generation of children "exposed to harmful emotional side effects" of social media.
Top temperature 24C/75F.