We are doing a B2B in January, and because they are insisting we get off, and back on again (both international cruises) we will do our own 2nd rat while we are off in Sydney. Like all other passengers on the 2nd cruise will do anyway. You cant have it both ways if they insist we get off, then we will do our own rat, if they let us stay on, then we will test on the last day of the first cruise.