Workers at General Motors Corp.’s Vauxhall factory in Ellesmere Port, U.K., have voted to strike over pay and pension issues, the Financial Times says.

The union rejected the auto maker’s offer for a 2-year deal that would have increased salaries 3% in the first year and matched pay raises to inflation in the second.

The proposed pact also outlined a 2% increase in pension contributions, along with a move from a weekly to monthly pay schedule. In addition, it eliminated pay parity for temporary workers.