Postal workers at a depot in Bristol will hold a series of strikes before Christmas following the breakdown of talks with Royal Mail today.
It's the first time the Mead Street depot in Bedminster has been on strike for 15 years.
Communication Workers Union spokesman Dave Wilshire said other depots are 'on the brink' of joining the action:
Managers seem incapable or unwilling to recognise the problem the postmen and women are facing on a daily basis.
We have no choice but to act following a series of meetings attempting to resolve this issue.
Royal Mail will receive notice next week for the first in a series of strikes in the run up to Christmas.
Posties claim they have unacceptable workloads following a series of changes by Royal Mail, who have previously claimed the problems were due to sickness levels at the depot.
Managers had been drafted in to help with the backlog of mail.
More top news
A pet cat in Somerset is recovering from being shot in the chest after a crossbow demonstration went wrong.
People have one more chance to get their hands on tickets for Glastonbury 2016 - special packages are being auctioned off for charity.
The iconic Shaun in the City figures are being auctioned off on Thursday. It's expected to raise millions for Bristol Children's Hospital