It happens that we request proof of the bank account used for deposits/withdrawals on Mr Green in order to verify the bank account used.
The easiest way for you to provide a bank statement is to log in to your online bank and take a screenshot where we can see your bank account number, your name, and the bank's logo in one picture and send it to us.
If you do not have access to your online banking, you can always go visit your bank and ask them to provide you with a bank statement. Make sure for the bank to stamp and sign the document.