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."
More top news
It'll be a mainly dry but chilly night for most of us with a risk of patchy frost, fog and low cloud later.
Ched Evan's fiancé Natasha Massey talks for the first time about why she has stood by him for the last five years.
Leanne Wood has said she accepts the referendum result but that it has left Wales with a weak position for negotiation.