P&O Ferries has sacked 800 employees over video call and plans to replace them with cheap agency staff after racking up losses of £100million a year.
The move has caused furore among union bosses and politicians, with some members of staff refusing to leave one of the ferries in protest and face being hauled off by security staff wearing balaclavas.
The RMT union said the issue was "fast turning into one of the most shameful acts in the history of British industrial relations".