You can transfer money abroad using Online Banking. Once logged in, click on your account and then select Manage account on the right hand side. Select Move money out on your Account Overview and go to the Outside the UK section of the Move money out page (scroll down).
To transfer money to an account you've paid into before:
Choose the payee from the drop-down menu, then Continue
The exchange rate, international payment fee and payment date will be shown
Enter a reference so the payee will know the payment is from you, complete the amount either in GBP or the foreign currency, then Continue
Check and Confirm your payment details
To transfer money to an account you've not paid into before:
Select NEW PAYEE, complete the payee's name and address and their SWIFT/Bank Identifier Code (BIC) and International Bank Account Number (IBAN), then Continue
Select the payee from the drop-down menu and follow the instructions above to complete the payment
The person you're paying needs to give you their SWIFT/Bank Identifier Code (BIC) and International Bank Account Number (IBAN). There will be a fee when you make an international payment; £10 per transaction for European countries and £20 per transaction anywhere else. The fee is dependent on the country you're sending the payment to and will be confirmed before you make your payment.