Thank you for your valuable feedback. Unless there are exceptional circumstances determined by the Captain, guests are not permitted to remain in their vehicles during the crossing - this is a rule enforced by our regulatory body. I'm not sure whether you were travelling alone, but we do have wheelchairs available and it would have been possible for you to board/disembark via the passenger gangway thereby avoiding the car decks. We will review our procedures to ensure staff are consistent in their advice to customers in a similar position. In the meantime, I hope you are recovering well from your operation.