Published Wednesday, 28 October 2009
Up to 120,000 members of the Communication Workers Union will walk out from 4am causing huge disruption to mail deliveries.
The strikes were confirmed despite three days of intensive talks between union leaders and Royal Mail bosses, under the chairmanship of TUC general secretary Brendan Barber.
The Royal Mail accused the union of walking away from the peace talks and condemned the new strikes.
Dave Ward, the union's deputy general secretary, said this week's talks had been the "most useful and productive" since the start of the bitter dispute over jobs, pay and modernisation.
Mr Ward said: "This series of strikes and future strikes can still be avoided and we remain available for discussions at any time, including tonight. We remain committed to reaching an agreed resolution."
But the company said the union was "playing havoc" with customer confidence.
Royal Mail managing director Mark Higson thanked Mr Barber for his efforts to broker a deal and said the company was willing to talk for "as long as it takes" to resolve the dispute.