The Borough of Camden will be the first to take delivery of the new "body-worn-video" cameras, with further trials in:
Officers will store material from each incident and keep it on file for a month, unless it is required for the purposes of evidence.
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Authorities have warned that the death toll is likely to rise as much of the building is yet to be searched.
The PM will sound out the possibility of new free trade agreements with Gulf states for once the UK has left the EU.