Balloting for industrial action has begun at Rolls-Royce over a pensions dispute. Workers are voting on whether to strike against plans to cut their pensions.
The firm says the cuts will total £80 million a year. Amicus said Rolls-Royce is proposing to slash £800 million from pensions, costing each worker up to £16,000 each.
Amicus general secretary Derek Simpson said: "Rolls-Royce is not treating its workforce in way that's commensurate with their levels of loyalty and skill.
"Rolls-Royce pension scheme members are prepared to pay increased contributions to ensure they have a fair and living wage in retirement but the company must pay more to reduce the scale of these draconian cuts to their employees' pensions."
Workers from plants including Derby, Sunderland, Bristol and East Kilbride will vote over the next few weeks on proposed strike action.
Rolls-Royce said it was planning to increase its contribution from £60 million to £90 million a year.
A spokesman said: "Having paid in more than most employers and seen the money invested successfully, the company has reached the conclusion that a benefit structure which still leaves the fund with a substantial deficit is unsustainable."