RM3052 | Computer issued payable order: Selecting for issue
From HM Revenue & Customs · Repayment Claims Manual
Files which are supervised and ready for the repayment to be issued should be kept in the following order
the ones marked URGENT at the front
the remainder in Potential Repayment number order.
You can then quickly identify those marked URGENT and you can make sure that these are issued with the next batch.