Postal workers volition nary longer spell connected onslaught aboriginal this period aft a ineligible situation from Royal Mail, the Communication Workers Union (CWU) says.
About 115,000 workers had planned to locomotion retired from 12:30 GMT connected 16 February, until 12:30 connected 17 February successful an ongoing enactment implicit wage and conditions.
But national bosses said precocious connected Monday that they would not combat a ineligible situation to the action.
It said the "risks of losing successful court" could interaction a caller onslaught ballot.
"The postal enforcement bash not judge it is worthy risking the presumption of the caller ballot to support a ballot mandate that expires connected 17 February," the CWU said.
The national said it would re-enter negotiations with Royal Mail aboriginal this week, but added "the absorption of the full national indispensable stay connected winning" the ballot to springiness it a caller mandate.
If the talks failed the CWU would "significantly measurement up the programme of onslaught action", it said.
Royal Mail confirmed to the BBC the strikes would not spell ahead.