Second Christmas postal strike in south Bristol
About 100 postal workers at a delivery office in south Bristol are staging a second one-day strike.
They first walked out for 24 hours on 10 December after talks between Royal Mail and union officials broke down.
The Communication Workers Union (CWU) says its members are on strike because they are being asked to do more work with fewer people.
Royal Mail said it would again bring in managers from other parts of the country to try to prevent a backlog.
More than 40,000 households and businesses will be affected by the action.
'Period of calm'
The 24-hour strike will mean there will be no deliveries by postal workers at the depot in Mead Street, Bedminster, which serves properties in the BS4 (Knowle) and BS14 (Hengrove) postcode areas, between 00:01 and 23.59 on Monday.
Collections will not be affected.
The CWU said delivery rounds had been revised, forcing too much work on the staff.
The union also said some members had been bullied by managers.
Bristol CWU area official David Wilshire said there would be no further strikes before Christmas.
"Of course we want to talk again. Unfortunately last week talks broke down and no further days of talks were planned.
"We're going to have a period of calm after today, a period of reflection."
He said there would be a meeting outside the depot on 8 January to decide the next step.
Royal Mail said it hoped further talks could be held to resolve the dispute.