You may have read that Royal Mail 24/48 service codes are changing. Specifically, services CRL, RM1 through RM4, PPF, PK9 and PK0 are being retired in favour of new service codes SU1 and SU2. As shown below.
As of June 30th 2018, you will notice that the old codes will no longer be available if you login and upload shipments manually into OBA. If you are using Shiptheory to automatically add shipment data to OBA, you do not need to make any changes. For Shiptheory, the existing 24/48 service codes will continue to work.
If you have any questions, please do not hesitate to contact us.