Port workers in the United Kingdom’s largest container port are planning to strike, a move which could further disrupt liner schedules and seafood supply chains.

Workers in the Port of Felixstowe are threatening to walk out after last-minute talks to avert a strike failed. Felixstowe is responsible for 48 percent of the UK’s container trade.

Some 92 percent of votes cast by 80 percent of its membership support a strike, the Unite trade union said.

UK workers are demanding a 5 percent pay increase from the Felixstowe Dock and Railway Company (FDRC), a subsidiary of Hong Kong-based CK Hutchison Holdings.