More than fifty staff at Crown Post Offices across Wales have gone on strike over proposals to offer their sites to be franchised.
Protesters outside a branch in Neath raised fears job may be lost.
"We are specialised in what we do, but we are specialised in the Post Office" said Marilyn O'Connell.
"Where do [people] go after this, if they've given 20/40 years service?"
More top news
We visit two communities in the South Wales Valleys which are preparing to mark the commemorations
Plaid Cymru says there'll be no savings from Brexit and calls on the UK government to borrow to meet the Leave campaign's promises to Wales
Jamie Clark, from Carmarthenshire, said officers restrained him in the cell - but he put his hand out as they tried to close the door.