Thousands of postal workers in the West Country are voting on Friday whether to go on strike.
It is the first Royal Mail national strike ballot since 2009 and comes after a breakdown of talks in a dispute over privatisation, pay and pensions.
Unions say privatisation will wreck the postal service and threaten deliveries to rural areas.
The Chief Executive of Royal Mail has moved to defend the controversial plan to privatise the organisation and warned workers that the threat of industrial action "makes no sense".
Moya Greene said she understood people's concerns, but insisted the privatisation would dispel "any doubt over the future ownership of the business" and "ensure secure employment" for workers.
The Chief Executive argued there should not be a strike at this "crucial time" for the company, adding that businesses who cannot rely on Royal Mail would look elsewhere.
Members of the Communication Workers Union based at Weston-super-Mare's Warne Road postal depot have voted to strike on Thursday 12th September.
They said it was in an ongoing dispute about the length of deliveries and disciplinary action that had been threatened against a number of workers.
This is in addition to a strike on August 17th and will affect postal deliveries in BS22, BS23 and BS24 postcode areas.
CWU Area Official Rob Wotherspoon said “We have made offers to resolve the disagreement but there is a question mark about whether the managers we are meeting have the authority to make the decisions that will prevent further conflict."
The Communication Workers Union said with the launch of a National Strike Ballot on September 13th and the continued battle over the ownership of the company further disruption at some point cannot be ruled out.
The agreement achieves both of our key aims: to enforce all national agreements and to resolve the many local issues. This has been made possible by the outstanding level of support shown by CWU members to their Union. This clearly shows that workers standing together can achieve results. We hope that it sends a strong signal both within our own Union and others"
Possible strikes by postal workers in Cornwall have been averted after talks between the Royal Mail and Communication Workers Union.
The two sides spent three days locked in talks at avoiding a planned two week strike.
A meeting of postal workers that was scheduled for today has been moved to Thursday.
Staff at the Weston super Mare depot are to decide the next steps in an ongoing dispute.
Royal Mail employees have already taken action over their claims of overloaded deliveries and bullying.
Postmen and women will meet on August 27th to decide their next move in the ongoing dispute between them and Royal Mail bosses.
Staff who are members of the Communication Workers Union held at strike at the weekend, about overloaded deliveries and allegations of bullying and harassment from managers.
Postal workers in Weston have made it clear they will not tolerate the current management approach. We will be meeting our members next Tuesday in order to agree the next course of action.
Royal Mail will be given every opportunity and a reasonable amount of time to resolve this dispute in a sensible and mature manner. If this is not the case then further strike action cannot be ruled out at Weston”.
Postal workers have been on strike in Weston-super-Mare and Bridgwater over what they claim are impossible targets set by managers.
Royal Mail says it isn't asking workers in Somerset to do more than staff elsewhere.
Our reporter, Katie Rowlett, was at the picket line.
Royal Mail staff at Bridgwater and Weston-super-Mare have been striking this morning over work practices.
They walked out in a dispute over allegations of bullying and overloaded deliveries.
It's expected to affect deliveries in the areas.