Customer needs to set up a new supplier with payment details and the bank details were given by the supplier  is with following format

US supplier ;

a routing number and swift code,  an account number   

Most of the suppliers in  IFS db has been set up with  an account number and sort code or an IBAN and swift number (BACS )

The New US supplier is being paid in GBP ,  can this be set up with  considering only  the account number and the Swift code without considering the routing number .

How we convert this to correct format , as existing format doesn't have routing information.

Thanks.