Andy Furey is the National Officer for Communication Workers Union, which represents staff working in Crown Post Offices.
He told ITV News: "A Welsh town like Holywell needs a Crown Post Office. If we lose it, this could be the death knell for the high street in Holywell."
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The unsettled weather conditions will keep levels down compared to last week.
A rather grey and damp afternoon for some with some outbreaks of showery rain.