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

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

Rivet and arrow on the low concrete parapet of a Bridge taking the Leicester Road over the Grand Union Canal near Market Harborough.

Cut benchmark in the parapet of a bridge taking Leicester Lane near Great Bowden over the Grand Union Canal. The parapet has been rebuilt, but unusually the original brick for the datum has been reinstated.

Rivet benchmark on the canal wall near the Swingbridge in Foxton Village.

A rivet Benchmark on the corner of an old livestock drinking trough in a field between Foxton and Lubenham.

An absolute bonzer day of Benchmark spotting near Market Harborough, three of which newly rediscovered on the database.

#BenchmarkMonday

#BenchmarkMonday 10.18m aOD on Merton Street off Grantchester Road, Cambridge. With a lovely little air brick as well.

No surprise Sylvia, we were still using these into the 90s in archaeology.
You want to sign up for #BenchmarkMonday, it's completely free.

Arrow point to an Ordnance Survey Benchmark on the tower of the church in Foxton Village, another arrow points to the Black Horse pub.

Pint of Sharps Doom Bar

Destination(s) achieved…

#Pubs #BenchmarkMonday

Historic stone boundary marker as described.

The boundary marker is in the background. To the fore is a slightly newer milestone with distances to Liverpool 30, Ormskirk 17, and Preston 1. There's a benchmark on the top.

An old boundary marker of the Port of Preston alongside the River Ribble. EB means East Bank, LQ on the top means Legal Quaystone. Strangely, the date 1844 has the 4's reversed.
#MilestoneMonday
#BenchmarkMonday
#Lancashire #history

Monday
#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.James, Tunbridge Wells.

Location of benchmark in the Ivy, indicated by a red arrow.

Cut benchmark on the ironstone at the front of the pub.

Tough datum hunting, obscured by the Ivy on the front of the Sondes Arms, Rockingham.

#BenchmarkMonday

#BenchmarkMonday 10.18m aOD on Merton Street off Grantchester Road, Cambridge. This devil's a little harder to spot than most, but it's there.

Small brass rivet in the concrete of a culvert parapet, obscured by Leylandii but revealed by a hand.

Leylandii, mortal enemy of Benchmark hunters.

Rivet on the low parapet of a Culvert in Melton.

#BenchmarkMonday

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