Beware when using a credit card if you are not the main card holder on the account. There is a loophole in the Consumer Credit Act relating to credit card refunds in the event of a breach of contract.
See here for full article http://www.computeractive.co.uk/computeractive/news/2268729/banks-tighten-policies-credit
I will be applying for a card in my own name now. I buy or book almost everything online as a secondary card holder and have never come across this but not worth the risk especially with holidays