Tram workers in Edinburgh have voted to strike during the festive period, amid union claims of bullying by bosses.
Almost 70% of Unite members in the ballot favored industrial action.
It comes after concerns were raised over staff being subjected to hostile and bullying management culture, including claims of victimization and fears about security of work.
Lyn Turner, of Unite, said: "This result gives our members a resounding mandate for action."
He said: "We are currently in talks with management and are hopeful that we can come to a sensible agreement that fully addresses our concerns and avoids the need to take action.
"Unite does not want to play Scrooge by interrupting Christmas travel for Edinburgh's citizens, but we need management to recognize that our members have legitimate concerns that must be addressed.
"A hostile and aggressive management culture does not provide safe and productive workplace, nor does it indicate dignity and respect in its treatment of workers."
He added the industrial action could cover the "run-up" to Christmas until the end of December.
The ballot had a 89% turnout, with almost 70% voting in favor of a strike.
A spokesman for Edinburgh trams said they continued to engage in productive conversations with Unite to better understand their concerns and they hoped to resolve the dispute without the need for industrial action.