CP gave you all the information you need. The only thing is that this is from a North American perspective and you are from the UK. It is possible that the rules and pricing "may" be different for you. However, I can't see a situation where a single would ever pay more than two people for a cabin.
Cruisemates Community Leader/Moderator
Upcoming Cruise(s) Carnival Liberty: May 31, 2014. The Anniversary Getaway.
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