Without seeing the employment contracts it will be difficult to determine. To complicate matters, the ships are registered in Cyprus. International maritime rules, which provide a lower level of protection, supersede UK rules. The workers spend the majority of the year at sea. Are they considered to be UK-based employees? The majority of ships which arrive in UK ports do not have crew employed under UK law. It could be argued the short fixed route is different, but it would be up to the courts to decide. I think P&O had enough money to consult lawyers to determine whether their proposed actions were legal, and presumably that opinion was positive? I assume DP World, given the apparent losses, could have put P&O Ferries into administration and sacked all the staff? They could then start again with the agency staff, although that would have taken a lot longer?
I doubt Carnival (nothing to do with DP World), who own the separate P&O Cruises, will be very unhappy with the damage done to their cruise operation by the name association. I suspect they will have to undergo a rebranding (and P&O Ferries will probably eventually have to do the same).
As an aside, P&O are committed to the Channel crossing. They have two new fuel-efficient ferries on order for delivery in 2023 and 2024 (presumably to replace older ships?)
