Tory ministers have been accused of "endorsing the thuggish fire and rehire tactics of P&O", after a memo revealed officials had been briefed about the firm's plan to sack workers in advance.
The shipping giant which operates four routes including Liverpool to Dublin, announced the mass dismissal of 800 staff last week - blaming £100 million losses caused by the pandemic.
The RMT union has claimed P&O vessels are now set to be crewed with Filipino workers on contracts paying below the minimum wage.