The Amicus and T&G trade unions in the U.K. are seeking an injunction to prevent Ford Motor Co. from canceling free ferry service to its Dagenham, U.K., plant.

The service transports some 300 workers to and from the plant daily from North Kent, U.K., says Amicus.

Both Amicus and T&G say the free service, in existence since the 1950s, is contractually obligated. The unions say dissolution of the ferry service will “make it impossible” for many of Dagenham’s Kent-based employees to get to work.

The unions contend alternative options, including two tunnels and a different ferry, would increase workers’ commute by two to four hours.