P&O Ferries has insisted it did not commit any offence in firing nearly 800 workers without notice, as it announced what it said was believed to be the largest compensation package in the British marine sector.
MPs had asked for confirmation that laws were not broken with the shock sacking and said the situation, which caused widespread outrage, had raised questions about UK employment law.
But P&O Ferries chief executive Peter Hebblethwaite said all vessels involved were registered outside the UK and the relevant authorities in each case had been notified.