The best answer to this is to contact the companies verbally rather than online. If you phone MacMillan I’m quite sure they have a list of recommended companies. I simply haven’t looked into it yet because I have no holidays booked and also I’m on zero treatment at all so wouldn’t stand a chance in hell of anyone offering me insurance. Worth stating though that I have been T4 since the day of my surgery and have had many long cruises with no problem with cover. I think if you are on treatment and that your PSA is low or stable , then cover can be offered !