The Prime Minister and Business Secretary will be on Wearside to see the first new model of the Nissan Leaf roll off the production line. David Cameron and Vince Cable will tour the factory in Sunderland.
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The threat level has been raised to critical by MI5's Counter-Terrorism Analysis Centre.
Prime Minister Theresa May announced the decision from Downing Street.
Newcastle Central Mosque is welcoming Muslims and non-Muslims alike this evening to stand in solidarity with the people of Manchester.