Postal workers in Weston-super-Mare have agreed to go on strike for the first time in 20 years.
Staff said it was over cuts and being asked to cover sickness and absenteeism.
On Tuesday morning, members of the Communication Workers Union said they would stage a series of one day strikes beginning in August.
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Jeremy Corbyn's visit has been one of the big talking points of another busy day at Glastonbury.
The Labour leader said socialist politics would not be put "back in a box" as he appeared on stage at the festival.
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