Venezuelan vice president Nicolas Maduro will address a Cabinet meeting live on state TV shortly, the government said amid speculation over the implications of Hugo Chavez's health downturn.
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Labour leadership candidate says Britain playing its role in the migrant crisis would help Cameron secure the promised reforms in Brussels.
Ten people have been taken to hospital and another two treated for injuries after a bus crashed into a tree in east London.
Cloudy skies for most as the Bank Holiday weekend begins - with brighter breaks through the south-east, the Midlands and East Anglia.