With reference to delivery and destination, the two most common permitted plates under the diagram 622.1A sign are "Except for loading" and "Except for access". As OSM has distinct access tag values where loading -> delivery and access -> destination, it does not seem unreasonable to expect the exception to be tagged *as signed*. It doesn't matter whether any current data consumes differentiate, because the law in the UK *does*. The delivery and destination values are similar, but not synonyms and should not be used interchangeably.