The RHB advises the OS of its survey results, and the OS accepts this information, using it in subsequent updates of its mapping. The RHB crowd is not a bunch of pirates making stuff up for its own amusement, it is a highly respected group of experts that is part of the process for updating our national mapping.
I think it is rather bad form to disrespect them just because one or two of their latest findings may cause a little inconvenience.
What baffles me is why people are getting uppity about what is a marvellous excuse for a little holiday to Cornwall, and another to Cumbria! Come on guys, this is a WIN - WIN situation