We do indeed have different laws, and arguably better protections. MyTA has been unable to get Regent to improve their offer. Regent are unquestionably contravening the UK Package Travel and Linked Arrangements regulations, so that is one avenue I am exploring. Complaining to the UK Advertising Standards Authority about knowingly false advertising is another.
Litigation is certainly unrealistic, but leveraging UK agencies to advise Regent of the errors of their ways, with the associated possibility of adverse publicity is not.