With an average temperature of 6C, the Met Office has confirmed this year's spring was the fifth coldest since national records began in 1910, and the coldest since 1962.
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The police officer was shot in the arm at a petrol station on the Crumlin Road, but is in a stable condition.
Temperatures tumbling again tonight with a widespread sharp frost and lows of -5C or -6C and icy spots in places
The victim was shot in the arm in a 'drive-by' shooting.