Peace vigils are set to be held across the UK today in protest of planned defence cuts.
ITV Central reports on the silent demonstration in Leicester.
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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.
In the unexpected announcement on Monday, Mr Key said it was the "right time" to leave politics.