The cost of sending a large letter up to 100g by second-class post rose from 58p to 69p at the end of April.

BBC: Price cap for parcels confirmed by mail regulator Ofcom

They are fed up with being treated like second-class workers by the Post Office and they want their concerns to be listened to.

BBC: Post office counter staff vote to strike

"We would urge people to start thinking about Christmas post and stocking up on second-class stamps now, " said Robert Hammond, of Consumer Focus.

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