A strike at Britain's largest container port will escalate unless workers are given an improved pay offer, a trade union boss said as she signalled that disruption could continue until Christmas.Sharon Graham, general secretary of the Unite trade union, addressed a flag-waving crowd of striking workers gathered on a roundabout near dock gate number one at the Port of Felixstowe in Suffolk.

A strike at Britain's largest container port will escalate unless workers are given an improved pay offer, a trade union boss said as she signalled that disruption could continue until Christmas.Sharon Graham, general secretary of the Unite trade union, addressed a flag-waving crowd of striking workers gathered on a roundabout near dock gate number one at the Port of Felixstowe in Suffolk.