David Earl wrote:
My bet is they were produced by pointing at an OS map (especially as
they are grid refs not lat/lon) and are therefore OS derived. The DfT
may be happy for anyone to use them however they want, but the OS will
not be.
Giving the coordinates as gridrefs, and not lat/lon
Indeed, but OS lays claim to data _derived_ from their maps,
not just
copying of the maps.
If GPS co-ordinates were the original source of the data, but they
had been converted to grid references to make it easier for people
to try looking up the locations on OS maps, would they still try and
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