Roger Gale from the Post Office said the Communication Workers Union were making "unrealistic" pay demands considering the fact that the company is losing £37 million a year.
The union was asking for a pay increase of three and a half percent last year, and three and a quarter percent this year, which Mr Gale said was "unaffordable."
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A chilly night with widespread frost and fog in some parts of the UK which will be slow to lift in the morning.