Workers at a firm which makes bricks will start a six-week strike tomorrow in a row over holidays.
Members of the GMB union at Hanson Brick in Peterborough will take action amid complaints that the company was trying to cut their holiday entitlement following a reorganisation which came into effect after the closure of brick works at Whittlesey in Cambridgeshire.
The company says staff were compensated for the changes to their terms and conditions.
A company spokesman added: "It is disappointing that, having accepted the compensation payment, a small section of the workforce has now changed their minds and elected to take industrial action."
"We have a contingency plan in place to ensure the factory continues to run and production is not disrupted."