After 800 staff were sacked with no noticed on a video call, P&O's ferries were suspended and didn't set sail.
Both the Pride of Hull and Rotterdam were berthed for more than a week, with staff being told to collect their belongings and demonstrations planned by unions. But last weekend P&O partly resumed services and some of the fleet setting sail again.
The Pride of Hull, which saw 82 of its crew sacked, remains suspended in Rotterdam's Europoort. However the Pride of Rotterdam is back in business, staffed by agency workers, who are believed to earn little more than £3 an hour.