Each Revolut client has an account, internally identified by a number called “reference.” This Revolut account can have up to 26 sub-accounts for 26 currencies. For each currency there exist an IBAN common to all Revolut clients. In order for money to be given to the right client, the correct “reference” must be entered for payment. In addition, there is GBP personal account number in UK national format and EUR personal IBAN. If you sent EUR to IBAN = GB47 LOYD 3080 1214 0888 68 + Your “reference”, you sent them to a common GBP account. SEPA payments are allowed for this account. Therefore, Lloyds (not Revolut) is likely to convert a GBP payment into their own rules and credit it to the account.