text: There appear to be many imaginary names or names that, if they do exist, are not signded, here.  The "London Orbital Motorway" is not the name of the M25, merely a description of it - look at http://ris.dev.openstreetmap.org/oslmusicalchairs/map?zoom=16&lat=51.7174&lon=-0.3870 if unsure.  What's the source of J21J, J21L, J21AM etc.?  These aren't signed on the ground (I spent lots of time sat in a queue on "J21J" a couple of weeks ago and feel sure I would have noticed a road name "J21J".  "St Albans By-Pass" is similarly fictional - see http://ris.dev.openstreetmap.org/oslmusicalchairs/map?zoom=16&lat=51.7174&lon=-0.3870 for details of that.