Go here: https://www.ibancalculator.com/iban_validieren.html
Enter your IBAN, e.g. GB07NWBK56000312345679
Click Validate.
Copy over the BIC, e.g. NWBKGB2L
And the Sort/Branch/Bank code, e.g. 560003
And the account number, e.g. 12345679
Go here: https://www.ibancalculator.com/iban_validieren.html
Enter your IBAN, e.g. GB07NWBK56000312345679
Click Validate.
Copy over the BIC, e.g. NWBKGB2L
And the Sort/Branch/Bank code, e.g. 560003
And the account number, e.g. 12345679