Peter Lawrence, father of missing Claire Lawrence from York, said the bill would help to ease the the financial and practical complications that families are faced with, when loved ones disappear and no death certificate can be issued.
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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.