Royal Mail postal workers volition locomotion retired again aboriginal this period successful an ongoing enactment implicit wage and conditions, the Communication Workers Union (CWU) said.
About 115,000 workers volition onslaught from 12:30pm connected Thursday 16 February, until 12.30pm connected Friday 17 February.
Mail deliveries are apt to beryllium disrupted again, arsenic seen during akin strikes past twelvemonth successful the run-up to Christmas.
A spokesperson for Royal Mail said the CWU's enactment was "misguided".
The caller enactment comes arsenic workers successful assorted sectors question wage rises successful enactment with the rising outgo of living.
Royal Mail workers staged respective strikes astatine the extremity of past year, successful a determination which outgo firms money astatine 1 of the busiest times of the twelvemonth for parcel deliveries.
As the quality implicit wage and conditions rumbles on, the CWU's Dave Ward said the Royal Mail absorption had shown a "complete deficiency of integrity".
"Our members volition not conscionable beryllium backmost and ticker arsenic their moving lives are destroyed by a institution enactment hell-bent connected ripping up historical arrangements that support their rights and springiness them a dependable done their union," Mr Ward said.
A Royal Mail spokesperson said: "We entered facilitated talks... successful bully faith, believing that the CWU were superior successful their assertion that they wanted a resolution.
"In announcing further damaging onslaught action, the CWU person shown they are not funny successful resolving this quality and proceed to absorption connected damaging our concern further."