Sentencing Twitter abuse pair Isabella Sorley and John Nimmo, Judge Howard Riddle said it was "hard to imagine more extreme threats."
The pair admitted sending a series of abusive message to feminist campaigner Caroline Criado-Perez.
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A police officer will not face prosecution over the death of Rashan Charles.
Ice is likely to cause tricky travel conditions in parts of England after the UK experienced a weekend of freezing temperatures and snow.
Angela Merkel has taken a step towards forming a cross-party coalition and ending months of political deadlock.