On Import for Specials, Package size should be ignored
Why is Special delivery looking at the package size field? It should ignore the field as not applicable - our imports have been failing to "Postage applied" if package size field is empty and failing completely if there is some text in the package field - the error is "The package size ' X ' mapped under header 'OrderPackageSize' is not supported by Royal Mail for international orders"
Special delivery is not international!
Work around is to put "Parcel" in field, but it shouldn't be necessary.