One lane blocked and queueing traffic due to broken down vehicle and recovery work on A1 Eastbound between A694 / A69 (Blaydon / Consett Turn Off) and A184 (Dunston Interchange).
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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.