Ordnance Survey Bench Marks
in the UK  
🔎   
 .
Bolt   National Rivers Authority Mr Red's
documenting of
Ordnance Survey Benchmarks
in the UK (& elsewhere)
on an ad hoc basis
modern survey Mark   restored cut Mark on a museum
in yellow brick   cancelled Mark    flush bracket   cut in brick
  horizontle cut Mark with Rivet where found.

mostly guided by the OS database
& www.bench-marks.org.uk/
  modern river


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