Within the EU, bank transfers are as free and as simple as local bank transfers. Enter the payee account information and transfer the 1c. If it goes through (and rejection can take up to 11 weeks), your bank is not sanctioning Cuba. Please let us know so we can compile a white list of banks complying with EU regulations. If it is blocked, initiate the bank's internal complaints process.  For UK bank customers, the first place to seek support on making an international transfer is your own bank, since every bank will have a different process for making transactions. Please check your bank's website or contact the bank directly.