No consultation for a redundancy were the service remains the same. Can notsee hwo this is compliant with UK employment law.
UK employment law is entirely irrelevant here, only international maritime law applies.
All the routes are contracted by the UK government. I'd say the government should have reviewed the contracts back in 2019 and done something to ensure the UK based staff are protected. But as we have observed the last few years the government has been rather distracted and incompetence at the same time. And now the horse has bolted.