London Webcams down again

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Why is it that every time there’s a demonstration in London, the traffic cameras in the area go down “for scheduled maintenance”? Today, during the May Day march in the centre of London, the Transport for London cameras are down, any BBC-owned cameras are off, and even the Fujitsu webcam was pointing at the sky. Once is a coincidence; twice is intriguing. Third time in 3 months – there’s something afoot, Watson, and people are starting to talk.