A Website that helps you to find Bench Marks

A month in the life of an Ordnance Survey Benchmark bagger

A Very British Map. The Ordnance Survey Story BBC Timeshift - YouTube link

Bench Mark Database

Keeping our fundamental benchmarks in order

Look at Life - On The Map - YouTube link (a bit of nostalgia)

Ordnance Datum Newlyn (ODN)

Ordnance Survey Bench Marks - Ray Hutchings

Ordnance Survey Maps

OS Page - Benchmark useful links

The Wetherby to Bulmer levelling line

Link to OS Benchmarks archive (csv file)

Link to OS Benchmark abbreviations list (pdf file)

Link to OS Bench Mark - Site engineering guide by Andrew Burgess

Self Guided Bench Mark Walk in Ely