Yes, I too looked at the new guidelines from Princess & thought a negative Rapid Antigen Test, not supervised was acceptable. BUT I also found this on scrolling down to the near bottom of the page 'What is acceptable as proof of a negative Covid-19 test result'
The following formats are acceptable proof of a negative COVID-19 test: paper COVID-19 test results (original only, no photocopies accepted), digital or emailed COVID-19 test results or record of COVID-19 testing from a healthcare provider including original digital email notification or personal electronic health record.
The negative COVID-19 test result must include:
Where the test was administered, including name and contact information for the laboratory or healthcare personnel who performed the test
Type of test (indicating it is a NAAT or antigen test)
A specimen collection date within the necessary time frame before cruise departure
Guest’s name and either date of birth, age or passport number
A negative test result using words or phrases including:
Negative
Undetectable
SARS-CoV-2 RNA not detected
SARS-CoV-2 antigen not detected
COVID-19 not detected
Not reactive
Test results marked “invalid” are not accepted.
I think we'll stick with the £14.95 one to be safe, I just thought initially that we still have some Government issued Rapid Antigen Test so we could use them. lol Think again!