Around 3,500 Parcelforce workers have voted overwhelmingly to reject the privatisation of Royal Mail in a consultative ballot.
The workers are members of the CWU union.
Some 93 percent opposed government plans to sell off the Royal Mail Group on a 72 percent turnout.
And 95 percent backed the union’s rejection of attacks on pensions while 96 percent supported the union’s pay claim.
The Tories want to put the post on the stock market for up to £3 billion. The vote by Parcelforce workers is another blow to their plans.
CWU reps last week voted unanimously to hold a strike ballot no later than September if an agreement to halt privatisation is not reached.
But the government is determined to press ahead. It has appointed advertising agency Engine to run a publicity campaign encouraging people to buy shares in Royal Mail.
CWU general secretary Billy Hayes said, “More than two thirds of the public are against privatisation.
“There is no argument for privatising Royal Mail. The government should drop this expensive and unpopular policy.”