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Explanation of Types

Type Description Examples
Flush Bracket These are rectangular metal plates affixed to triangulation pillars, walls, buildings etc. If they are not affixed to a triangulation pillar they are often referred to as Non-Pillar Flush Brackets (NPFB). They are about 6" x 3" in size and the location of most of them is known through Ordnance Survey (OS) records. Each Flush Bracket (FB) has a unique serial number which makes them highly 'collectable' and there are several numbering types.  
  One to four figure number
The earliest FBs you can find and date from 1912-1921. Numbered from 1-3000. A few can be found on triangulation pillars.
5
  S-prefix
Introduced in the 1920s these are found on pillars and as NPFBs. There are two sub-types, S below the number and S left of the number.
S0950
S8628
  G-prefix
First appeared in 1936. Unlike S-series brackets numbers below 1000 do not have leading zeroes. Used extensively in Scotland and never found on triangulation pillars.
G3646
  L-prefix
Just sixteen brackets used in London in the early 1930s.
 
  Five figure number
These are effectively S-series brackets above S9999 where they ran out of room for the S (S-below was discontinued as the S interfered with the measuring equipment).
11328
Projecting Bracket An early type of metal bracket used for a short time before the introduction of flush brackets. They are all the same and have no unique attributes. Reading, Greyfriar's Church
OSBM Bolt Used alongside the G-series of flush brackets these are placed where there wasn't a convenient building or wall to provide a vertical surface on which to affix a flush bracket. They are domed metal bolts about 1" (50-60mm) in diameter fixed to horizontal surfaces engraved with OSBM and the benchmark symbol. Caban Coch Dam
Cut Bench Mark By far the most common type. Used and made from the 1800s to around 20 years ago. You won't have to walk (or drive) very far in any village, town or city in Britain before you spot one of these. Chiseled into stone, brick or wood on all sorts of vertical structures. A familiar horizontal levelling line with a three line arrow pointing towards it (usually upwards). Each one is unique depending on the mason who cut it, some are plain, some decorated. Some roughly cut, some exquisitely cut with high accuracy. Some small, some huge. Wallingford, 60 High Street
Cut Bench Mark with Bolt Old and rare these have a metal bolt screwed either alongside the horizontal cut of a cut bench mark or at the point of the cut arrowhead. Usually has what appears as a screwhead horizontal in the head of the bolt. These are highly prized by benchmarkers. Dorchester Abbey
Rivet Usually found on horizontal surfaces these are cut marks with a small metal domed brass rivet at the apex of the cut arrowhead marks. Swyncombe, Icknield Field
Pivot Fairly rare these are used on horizontal surfaces such as soft sandstone, where the insertion of a rivet would break away the stone. They consist of a small hole or depression cut to take a pivot, a steel ball bearing of 5/8" diameter (16mm). In use, the pivot is placed in the depression and the levelling staff held on top of the pivot. Sutton Bridge
Fundamental Bench Mark These are the key to the whole levelling of the UK. Granite blocks with large domed metal caps. Just like an iceberg this is just the tip of a fairly extensive underground structure. Highly accurate height stations still used today as the baseline to levelling. Conwy
Triangulation Pillar Familiar to anyone who walks in the British countryside, these can often (but not always) be found at hilltops. Most have a flush bracket affixed to one side. Huntingland
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2018

October 2018
Cut Bench MarkBarnetby le Wold, Kings Road
Cut Bench MarkNottingham, 48-50 Queen's Road
Cut Bench MarkCheddington, Station Road Railway Bridge
Flush BracketG2317 - Wolverton, Millmead Hall
September 2018
Cut Bench MarkGloucester, Museum of Gloucester
Cut Bench MarkGloucester, Christ Church
Cut Bench MarkGloucester, Spa Road
UnknownGloucester, Cedar House, Spa Road
UnknownGloucester, 1 Llanthony Road
RivetGloucester, Baker's Quay
UnknownGloucester, Llanthony Warehouse
Cut Bench Mark with BoltGloucester, Mariners Church
Cut Bench Mark with BoltGloucester, St Mary de Crypt Church
Cut Bench Mark with BoltGloucester, Greyfriars House
Cut Bench MarkGloucester, Odeon Cinema
UnknownGloucester, 37 Westgate Street
Flush Bracket333 - Gloucester, Shire Hall
DestroyedGloucester, Westgate Street Electricity Substation
Cut Bench MarkGloucester, St Nicholas' Church
Cut Bench MarkGloucester, 2 St Mary's Street
Cut Bench MarkGloucester, St Mary's Street
Cut Bench MarkGloucester, The King's School, Archway
Cut Bench Mark with BoltGloucester, 8 Pitt Street
Cut Bench MarkGloucester, The King's School, Gymnasium
Cut Bench Mark with BoltGloucester, Holy Trinity Cathedral, South Transept
UnknownGloucester, Holy Trinity Cathedral, SE Angle
Cut Bench Mark with BoltGloucester, St John the Baptist Church
Cut Bench MarkGloucester, St Michael's Tower
Cut Bench MarkRedmire, Railway Station
Cut Bench MarkLeyburn, Harmby Road
Cut Bench MarkLeyburn, Middleham Road
Cut Bench MarkLeyburn, St Matthew's Church
Cut Bench MarkLeyburn, Town Hall
Cut Bench MarkLeyburn, Wensley Road
DestroyedLeyburn, West Cottage
UnknownLeyburn, 6 Manor Court
Cut Bench Mark with BoltLeyburn, St Peter and St Paul RC Church
August 2018
Cut Bench MarkWestminster, Kensington Gardens, The Fountains
Cut Bench MarkWestminster, Hyde Park, The Lido Pavilion
PivotWestminster, Hyde Park, The Serpentine
Flush BracketL1 - London, British Museum
Cut Bench MarkLondon, British Museum, Longfield Mark #13
Cut Bench MarkLondon, British Museum, Entrance
UnknownLondon, 6 Southampton Row
Cut Bench MarkWestminster, Hyde Park, Serpentine Weir
DestroyedWestminster, Hyde Park, Disused Fountain
Cut Bench MarkWestminster, Kensington Gardens, Bandstand
PivotWestminster, Kensington Gardens, The Broad Walk BS
Cut Bench MarkWestminster, Kensington Gardens, Budges Walk BS
Cut Bench MarkPlymouth, Wyndham Street East
Cut Bench MarkPlymouth, Cathedral House
Cut Bench MarkPlymouth, 1 The Esplanade
Cut Bench MarkPlymouth, Hoe Promenade, Entrance Pillar
Cut Bench MarkPlymouth, 16 Elliot Street
Cut Bench MarkPlymouth, Cliff Road, SW Hoe Entrance
Cut Bench MarkPlymouth, Leigham Street
Cut Bench MarkPlymouth, Cliff Road, SW Shelter
Cut Bench MarkPlymouth, Cliff Road opp. 19
Cut Bench MarkPlymouth, Radford Road opp. 5 Northumberland Terrace
Cut Bench MarkPlymouth, Radford Road / Garden Crescent
Cut Bench MarkPlymouth, 17 Walker Terrace
Cut Bench MarkPlymouth, West Hoe Road / Cliff Road
DestroyedPlymouth, Millbay Docks
Cut Bench MarkPlymouth, Great Western Road opp. Garden Crescent
Cut Bench MarkPlymouth, Grand Parade opp. Rear 26
DestroyedPlymouth, Rock Cottage
OSBM BoltPlymouth, Grand Parade
Cut Bench MarkPlymouth, Maritimo, Hoe Road
Cut Bench MarkPlymouth, Madeira Road, Steps
Cut Bench MarkPlymouth, Madeira Road / Hoe Road
RivetPlymouth, Hoe Promenade
Cut Bench Mark with BoltPlymouth, Royal Citadel, West Sally Port
UnknownPlymouth, Hoe Park, Outbuilding
Cut Bench MarkPlymouth, Royal Citadel, Prince George's Bastion
UnknownS0720 - Plymouth, Lambhay Hill
Cut Bench MarkPlymouth, Royal Citadel, Prince of Wales Bastion
Cut Bench MarkPlymouth, Hoe Road, Park Entrance
RivetPlymouth, Citadel Road opp. 181
Cut Bench MarkPlymouth, Palace Court
Cut Bench MarkPlymouth, 94 Vauxhall Street
Cut Bench MarkPlymouth, Vauxhall Quay
DestroyedPlymouth, Hawkers Avenue
DestroyedPlymouth, Harbour Avenue
DestroyedPlymouth, Sutton Road / Marrowbone Slip
DestroyedPlymouth, Lockyers Quay
DestroyedPlymouth, 1 Clare Place
Cut Bench MarkPlymouth, St John's Bridge
Cut Bench MarkPlymouth, St John's Mews
Cut Bench MarkPlymouth, St John the Evangelist Church
Cut Bench MarkPlymouth, 192 Exeter Street
Cut Bench MarkPlymouth, Tothill Road / Desborough Road
Cut Bench MarkPlymouth, Tothill Road Railway Bridge
Cut Bench MarkPlymouth, St Jude's Church
Cut Bench MarkPlymouth, Tothill Avenue opp. Salisbury Road
Cut Bench MarkPlymouth, Tothill Avenue / Beaumont Road
Cut Bench MarkPlymouth, Beaumont Road
Cut Bench MarkPlymouth, Holy Cross Primary School
Cut Bench MarkPlymouth, Charles Church
Cut Bench MarkPlymouth, Eastlake House
Cut Bench MarkPlymouth, 8 Old Town Street
DestroyedPlymouth, East Quay Dock Office
Cut Bench MarkPlymouth, Cattedown Road
Cut Bench MarkPlymouth, Cattedown Road Archway
Cut Bench MarkTurnchapel, Boringdon Road
DestroyedOreston, Lower Saltram
UnknownOreston, 139 Plymstock Road
Cut Bench MarkPlymouth, Bulmer Road Railway Bridge
UnknownPlymouth, Lucas Terrace Railway Bridge
UnknownPlymouth, Embankment Road, Pylon
Cut Bench MarkPlymouth, Embankment Road, The Embankment
Cut Bench MarkPlymouth, Embankment Road, Lipson Lake
Cut Bench MarkPlymouth, Embankment Road opp. Bus Stop
UnknownPlymouth, Arnolds Point
Cut Bench MarkPlymouth, Embankment Road, Lanhydrock Road Bus Stop
Cut Bench MarkPlymouth, New Laira Bridge
Cut Bench MarkPlymouth, Old Laira Bridge
Flush BracketG5016 - Plymouth, Rock Gardens Railway Bridge
UnknownPlymouth, Lanhydrock Road Railway Bridge
Cut Bench MarkPlymouth, Beaumont Road, Astor Drive Bus Stop
Cut Bench MarkPlymouth, 66 Elm Road
Cut Bench MarkPlymouth, Ashford Hill
Cut Bench MarkPlymouth, Mutley Methodist Church
UnknownPlymouth, 12 Dale Road
Cut Bench MarkPlymouth, 9 Gordon Terrace
DestroyedPlymouth, 1A Restormel Terrace
Cut Bench MarkPlymouth, 38 Derry Avenue
Cut Bench MarkPlymouth, Houndiscombe Road / Sutherland Road
UnknownPlymouth, 48 North Road East
Cut Bench MarkPlymouth, 2 Houndiscombe Road
Cut Bench MarkPlymouth, Houndiscombe Road Junction
Cut Bench MarkPlymouth, 44 Houndiscombe Road
Cut Bench MarkPlymouth, 53 Houndiscombe Road
Cut Bench MarkPlymouth, 20 Napier Terrace
Cut Bench MarkPlymouth, 20 Mutley Plain
Cut Bench MarkPlymouth, Houndiscombe Road Electricity Substation
Cut Bench MarkPlymouth, Mutley Baptist Church
Cut Bench MarkPlymouth, Citadel Road / Lambhay Hill
Cut Bench MarkPlymouth, Friars Lane / New Street
Cut Bench Mark with BoltPlymouth, 7 Castle Dyke Lane
Cut Bench MarkPlymouth, 22 Southside Street
Cut Bench MarkPlymouth, The Barbican opp. Admiral MacBride
Cut Bench MarkPlymouth, Barbican Theatre
DestroyedPlymouth, 63-64 Notte Street
Cut Bench MarkPlymouth, 72 Alma Road
Cut Bench MarkPlymouth, 139 Stuart Road
Cut Bench MarkPlymouth, 18 Wilton Street
DestroyedPlymouth, Archer Place
Cut Bench MarkPlymouth, Patna Place
Cut Bench MarkPlymouth, The Town House
DestroyedPlymouth, All Saints' Church
DestroyedPlymouth, Hastings Terrace
DestroyedPlymouth, Oxford Street Primary School
PivotPlymouth, 21 Oxford Place
DestroyedPlymouth, Millbay Station
Cut Bench MarkPlymouth, Richmond Walk opp. Car Park
Cut Bench MarkPlymouth, 253 James Street
Cut Bench MarkPlymouth, Richmond Walk opp. Play Area
Cut Bench MarkPlymouth, Richmond Walk opp. Lido
Cut Bench MarkPlymouth, Richmond Walk, Park Entrance Archway
Cut Bench MarkPlymouth, Richmond Walk opp. Access Slope
Cut Bench MarkPlymouth, Richmond Walk opp. 10 Bakers Place
DestroyedPlymouth, Richmond Walk, Mayflower Marina
Cut Bench MarkCrowntown, B3303 Gatepost
Cut Bench MarkTregathenan, Tregadjack
Cut Bench MarkTruthall, Truthall Halt Railway Bridge
DestroyedPlymouth, 38/39 Notte Street
Cut Bench MarkPlymouth, St Andrew's Church Wall
Cut Bench MarkPlymouth, The Treasury, Catherine Street
Cut Bench MarkPlymouth, Guildhall
Cut Bench MarkPlymouth, Armada Way PC
Cut Bench MarkPlymouth, Paradise Road Railway Bridge
Cut Bench MarkPlymouth, 31 Alcester Street
Cut Bench MarkPlymouth, 21 Alcester Street
Cut Bench MarkPlymouth, Boscawen Place Railway Bridge
Cut Bench MarkPlymouth, 32 Camperdown Street
Cut Bench MarkPlymouth, 3 Camperdown Street
Cut Bench MarkPlymouth, 28 Pasley Street
Cut Bench MarkPlymouth, Pasley Street Railway Bridge
Cut Bench MarkPlymouth, Royal Navy Avenue Railway Bridge
RivetPlymouth, Royal Navy Avenue opp. St Thomas' Church
Cut Bench MarkPlymouth, Renown Street Electricity Substation
RivetPlymouth, Alexandra Park Entrance
DestroyedPlymouth, 46 Beatrice Avenue
Cut Bench MarkPlymouth, 56 Station Road
Cut Bench MarkPlymouth, Moor View
Cut Bench MarkPlymouth, Brunel Terrace Railway Bridge
Cut Bench MarkPlymouth, 1 Railway Cottages
Cut Bench MarkPlymouth, North Prospect Road opp. Buckfast Close
DestroyedPlymouth, Weston Mill Cemetery Entrance
Cut Bench MarkPlymouth, Weston Mill Cemetery Lodge
Cut Bench MarkPlymouth, Ferndale Road opp. 20 Vermont Gardens
DestroyedPlymouth, 40 Bridwell Road
DestroyedPlymouth, St Philip's Church
Cut Bench MarkPlymouth, 183 Bridwell Road
DestroyedPlymouth, 117 Bridwell Road
DestroyedPlymouth, 6 Eliot Street
Cut Bench MarkPlymouth, 41 Eliot Street
DestroyedPlymouth, 4 York Road
UnknownPlymouth, 440 Wolseley Road
Cut Bench MarkPlymouth, 25 Harbour Avenue
DestroyedPlymouth, 17 Rodney Street
Cut Bench MarkPlymouth, Carlton Terrace Railway Bridge
July 2018
Cut Bench MarkAldeburgh, Cross House
Cut Bench MarkAldeburgh, Moot Hall
Cut Bench MarkAldeburgh, 77 High Street
Cut Bench MarkAldeburgh, 181 High Street
Cut Bench MarkAldeburgh, 270 High Street
DestroyedThorpeness, Workmen's Club
DestroyedThorpeness, Old Homes Road
UnknownThorpeness, Mission Room
DestroyedS8105 - Thorpeness, Estate Office
Cut Bench MarkOrford, Orford Primary School
Cut Bench MarkOrford, 108 Front Street
UnknownOrford, 18 Ferry Road
Flush Bracket2678 - Orford, St Bartholemew's Church
Cut Bench MarkOrford, 48 Church Street
Cut Bench MarkOrford, The Jolly Sailor
DestroyedOrford, Pinney's, Quay Street
DestroyedOrford, Orford Quay
Cut Bench MarkOrford, Methodist Church
UnknownOrford, Orford Castle
DestroyedS018 - Reydon, Bridge House
Cut Bench MarkWoodbridge, 47 Thoroughfare
DestroyedWoodbridge, 31 Thoroughfare
Cut Bench MarkWoodbridge, 31 New Street
DestroyedWoodbridge, Shire Hall
Cut Bench Mark with BoltWoodbridge, St Mary's Church
Flush BracketS0221 - Woodbridge, Crown Hotel
Cut Bench MarkWoodbridge, Quay Street / Crown Place
Cut Bench MarkWoodbridge, 5 Station Road
DestroyedWoodbridge, Quay Point
UnknownWoodbridge, Kyson Hill
DestroyedWoodbridge, Broomheath Railway Bridge
DestroyedWoodbridge, Sea Wall Shelter
UnknownWoodbridge, Sea Wall Jetty
UnknownSouthwold, Methodist Church
Cut Bench MarkSouthwold, North Green
Cut Bench Mark with BoltSouthwold, St Edmund's Church
Cut Bench Mark with BoltSouthwold, United Reformed Church
UnknownSouthwold, 9 North Parade
Cut Bench MarkSouthwold, 26 North Parade
Flush BracketG1514 - Southwold, Pumping Station
Cut Bench MarkSouthwold, 7 Ferry Road
Cut Bench MarkSouthwold, 14 South Green
Cut Bench MarkSouthwold, 9 East Cliff
UnknownSouthwold, Pier Pavilion
Cut Bench MarkHalesworth, St Mary's Church
DestroyedHalesworth, The Old Hawk
Cut Bench MarkHalesworth, The White Hart
Cut Bench MarkDunwich, Coastguard Cottages
UnknownDunwich, Beach Road
Cut Bench MarkDunwich, St James's Street
Cut Bench MarkDunwich, Bridge Farm Cottage
Cut Bench MarkDunwich, St James's Church
UnknownDunwich, Beehive Cottage
Flush BracketS016 - Dunwich, High Street
Cut Bench MarkDunwich, Greyfriars Gateway
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Explanation of Types
Flush BracketFlush Bracket(195)
Projecting BracketProjecting Bracket(6)
OSBM BoltOSBM Bolt(10)
Cut Bench MarkCut Bench Mark(1338)
Cut Bench Mark with BoltCut Bench Mark with Bolt(83)
RivetRivet(92)
PivotPivot(50)
Fundamental BenchmarkFundamental Benchmark(8)
Triangulation PillarTriangulation Pillar(93)
DestroyedDestroyed(285)
UnknownUnknown(214)
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