text: Hi,
  I suspect time has overtaken the question as the collection plate is increasingly likely to show the same unhelpful, but cheap to produce answer as recent RM boxes seem to be standardised to:
  
  collection_times 	Mo-Fr 09:00; Sa 07:00
  
  Certainly, (almost) all of the urban boxes I've looked at recently have identical values.
  https://www.mapillary.com/app/?pKey=5775084752598199
  
  `royal cypher=scottish_crown` is also very likely (only ever found one 'stranger' of a Scottish box in England!).
  Happy Mapping,
  
  James