To answer the question about which credit cards can/cannot be used in Cuba? If your issuing bank is any way affilliated with America, then you cannot use them.

 Can Be Used

Cannot Be Used

 Bank Of Scotland  Alliance & Leicester
 Royal Bank Of Scotland
MBNA - any card issued by MBNA
 Clydesdale Bank  Virgin Money Mastercard/Visa
 Lloyds TSB (Mastercard & Debit card, not Amex Airmiles Duo)  Virgin Atlantic AMEX
 Master Card (NO U.S. bank affiliation - verify before you go!)  
Visa International (NO U.S. bank affiliation - verify before you go!)  
Cabal




Canadian Credit Union Cards (part owned by US Company in 2008)