Issue with Royal Mail API is now resolved. Emergency manifests have been resubmitted to Royal Mail and services should now load correctly.
Shipping servicePartial Outage - Linnworks.net
There is currently an issue with Royal Mail API, which will prevent customers from viewing/editing their services in the Shipping integration section as well as will cause an Emergency manifest to be produced when filed. All manifests will be resubmitted from our end as soon as Royal Mail API will be back up.
Label printing will not be affected for the customers.