Families in North Yorkshire say they are disappointed that paediatric and maternity services at their local hospital will be scaled back.
The future of the units at the Friarage hospital will be debated in a public consultation - which will start next week.
Health bosses say the units are too small to be safe and that people will get a say on what services will remain.
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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.
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