UPDATE:
As of 18/9 10 UTC, processing operations on our production system has been restored to normal and all files from 7 UTC have been processed and output into the EMADDC product files (BUFR, CSV).
Files that have not been processed (between 16/9 10 UTC and 18/9 7 UTC) will be reprocessed and part of our historic datset.
The underlying issue has been identified and fixed to assure the same issue does not occur again in the future.