Horizontal line on damaged bricks of a house.

Cut benchmark on a bridge over a stream, half a metre below road level.

Cut benchmark on the lower stone courses of a red brick barn.

This weeks Tough Datum Hunting included cut marks on damaged bricks in Kettering, a scramble down to a stream for a bridge near Market Bosworth, and a surprisingly well preserved mark on the stone course of a barn in Barton on the Beans.

#BenchmarkMonday

#AllMetalMonday
#BenchmarkMonday
#BlueMonday
#BrutalMonday / #MondaysAreBrutal
#ClassicLitMonday
#JadeMonday
#MagentaMonday
#MallardMonday
#MammalMonday
#ManholeCoverMonday
#ManuscriptMonday
#MapMonday
#MarbleMonday
#MaritimeMonday
#MarketMonday
#MedievalMonday
#MementoMoriMonday

Seems there's a whole community for this hobby - I'll have to start getting involved! 😊👍

#BenchmarkMonday

2/ More suggested hashtags to join on a Monday

#MistyMonday

#MapMonday
#BenchmarkMonday

#MilestoneMonday

#MountainMonday

#MarketMonday

#MaritimeMonday

#MonumentMonday
#MemorialMonday
#MementoMoriMonday

2 of 7   #MondayHashtags

Happy #BenchmarkMonday from Nutley, St James the Less.

#BenchmarkMonday 9.175m on the gateway of Christ College, Cambridge

OS benchmark cut on the rendered wall of a ruined building

Bah. Found this benchmark over the weekend and forgot to post it on #BenchmarkMonday ( #geodesy ). It is this one: www.bench-marks.org.uk/bm229665

Happy #BenchMarkMonday Here’s a cracker at The Anchor,Bankside, That London. Check it out and treat yourself to a beverage

Cut benchmark on a red brick wall of Siddals Road

Siddals Road in Derby is perhaps better known for its pub, the Alex’, but opposite you can find an Ordnance Survey Benchmark.

#BenchmarkMonday

Monday
#AllMetalMonday
#BenchmarkMonday
#BlueMonday
#BrutalMonday / #MondaysAreBrutal
#ClassicLitMonday
#JadeMonday
#MagentaMonday
#MallardMonday
#MammalMonday
#ManholeCoverMonday
#ManuscriptMonday
#MapMonday
#MarbleMonday
#MaritimeMonday
#MarketMonday
#MedievalMonday
#MementoMoriMonday

2/ More suggested hashtags to join on a Monday

#MistyMonday

#MapMonday
#BenchmarkMonday

#MilestoneMonday

#MountainMonday

#MarketMonday

#MaritimeMonday

#MonumentMonday
#MemorialMonday
#MementoMoriMonday

2 of 7   #MondayHashtags

Good morning all. Happy #BenchmarkMonday from St Luke's, Chiddingstone Causeway. It was built in 1897–1898 to a design by John Francis Bentley in a loosely Decorated Gothic Revival style, replacing a tin tabernacle.

An OS Flush Bracket set into a retaining wall on the slope down to the basement of the British Museum

OS Flush bracket bench mark set into the wall behind a handrail. A plaque below reads. “THIS BRACKET LI IS 86.901 FT ABOVE MEAN SEA LEVEL NEWLYN”

OS Flush Bracket with the designation LI (L1) set into a retaining wall on the South East wing of the British Museum, London

A lovely flush bracket for #BenchMarkMonday at the British Museum, That London. Not quite visible from the publicly accessible part of the entrance courtyard but as I was in a meeting with staff I was able to get up close and personal.

Monday
#AllMetalMonday
#BenchmarkMonday
#BlueMonday
#BrutalMonday / #MondaysAreBrutal
#ClassicLitMonday
#JadeMonday
#MagentaMonday
#MallardMonday
#MammalMonday
#ManholeCoverMonday
#ManuscriptMonday
#MapMonday
#MarbleMonday
#MaritimeMonday
#MarketMonday
#MedievalMonday
#MementoMoriMonday

2/ More suggested hashtags to join on a Monday

#MistyMonday

#MapMonday
#BenchmarkMonday

#MilestoneMonday

#MountainMonday

#MarketMonday

#MaritimeMonday

#MonumentMonday
#MemorialMonday
#MementoMoriMonday

2 of 7   #MondayHashtags

Good morning all. Happy #BenchmarkMonday from St Nicholas Church, Sevenoaks.

#BenchmarkMonday 32.551m aOD on St George's Church, Thriplow

Cut Ordnance Survey Benchmark low down on a low wall near Peterborough’s iconic Blue Railway Bridge.

Entrance to the Session House, formerly a Gaol, then a pub, now an NHS property. Benchmark to the left of the door.

Ordnance Survey Cut Benchmark and Bolt in the stone.

Plaque by The Peterborough Society for The Session House.

Todays tough, and not so tough Datum Hunting in Peterborough.

#BenchmarkMonday

2/ More suggested hashtags to join on a Monday

#MistyMonday

#MapMonday
#BenchmarkMonday

#MilestoneMonday

#MountainMonday

#MarketMonday

#MaritimeMonday

#MonumentMonday
#MemorialMonday
#MementoMoriMonday

2 of 6   #MondayHashtags

A bench mark carved onto a corner stone of the tower of St. James’ church, Piccadilly.

An oval plaque, set into a brick wall commemorating the restoration of St. James’ Church, Piccadilly

One for #BenchMarkMonday on the tower of St. James’ Church, Piccadilly. 17.681m aod. Also nice plaque commemorating the restoration of the church following damage from enemy action during the Second World War.

I’m going to also count the cover of the Earth Rod for #JustAnotherManholeMonday

#AllMetalMonday
#BenchmarkMonday
#BlueMonday
#BrutalMonday / #MondaysAreBrutal
#ClassicLitMonday
#JadeMonday
#MagentaMonday
#MallardMonday
#MammalMonday
#ManholeCoverMonday
#ManuscriptMonday
#MapMonday
#MarbleMonday
#MaritimeMonday
#MarketMonday
#MedievalMonday
#MementoMoriMonday

Good morning all. Happy #BenchmarkMonday from St.Peters Church, Pembury. The Old Church dates back to around 1085, and much of it was rebuilt in 1337.

#SluiceValveSunday and an early #BenchmarkMonday

A brick wall with an Ordnance Survey Bench Mark highlighted in red chalk. Royal Hospital Building, junction of West Road and Royal Hospital Road. AOD 7.294m

Stone wall with ornate railing. A faded OS Bench Mark. Can be seen on the wall. BM @19.505m AOD

A couple of beauties for #BenchMarkMonday Royal Hospital Chelsea (Red Brick) and Burlington House, Piccadilly

A cut Benchmark and rainbow painted Fire Brigade Emergency Sprinkler Inlet sign on one of Northampton’s many former boot and shoe factories.

A brass Rivet and faint arrow on a concrete step at the entrance to an electricity substation in Blaby. Hard to spot as the rivet is obscured beneath the metal gates.

Another difficult to find cut benchmark, the original description states it’s on the south parapet of this canal bridge in Glen Parva, but in fact it’s on the North parapet, and facing a busy main road.

Cut benchmark on a corner stone of St Edmunds Church in Egleton, Rutland.

This week’s Tough Datum Hunting in three counties: Northampton, Blaby and Glen Parva in Leicestershire, and Egleton in Rutland.

#BenchmarkMonday

2/ More suggested hashtags to join on a Monday

#MistyMonday

#MapMonday
#BenchmarkMonday

#MilestoneMonday

#MountainMonday

#MarketMonday

#MaritimeMonday

#MonumentMonday
#MemorialMonday
#MementoMoriMonday

2 of 6   #MondayHashtags

Good morning all. #WalkBeforeWork and happy #BenchmarkMonday from
St Swithun's Church, East Grinstead.

Monday
#AllMetalMonday
#BenchmarkMonday
#BlueMonday
#BrutalMonday / #MondaysAreBrutal
#ClassicLitMonday
#JadeMonday
#MagentaMonday
#MallardMonday
#MammalMonday
#ManholeCoverMonday
#ManuscriptMonday
#MapMonday
#MarbleMonday
#MaritimeMonday
#MarketMonday
#MedievalMonday
#MementoMoriMonday

#BenchmarkMonday 17.396m aOD on St Mary and St Andrew's church, Grantchester. A rare horizontal mark, if you were a little confused.

Red brick substation, cut Ordnance Survey benchmark highlighted with a red arrow.

This once served the site of industry opposite the old GEC site in Whetstone, now a row of new-build houses. I’m not sure whether these gas installations are called Substations but they serve a similar function, and this one comes with a bonus Brnchmark.

#SubstationSunday
#BenchmarkMonday