Certain |
Possible |
Questionable Doubtful |
Rejected |
|
Confidence is a statement of the site as a medieval fortification or palace |
| Name | Alternative Name(s) | County | Remains |
| Bayards Cove, Dartmouth | Bearscove Castle | Devon | Major |
| Berwick Town Wall , Spades Mire and Lord's Mount | The Ditches; Cowgate; Scotsgate; Bell Tower; Shore Gate | Berwick upon Tweed | Major |
| Brightlingsea | Essex | Nothing visible | |
| Brighton Blockhouse | Sussex | Nothing visible | |
| Brownsea Castle | Branksea; Poole; Brensey | Dorset | Masonry ruins/remnants |
| Calshot Castle | Caldshore; Calshott; Cawshot | Hampshire | Major |
| Camber Castle | The Chamber; Winchelsea; Camere; Caumbre; Chambre; Rye | Sussex | Major |
| Carlisle Citadel | Nisi Prius Court; Court House; Assize Court; Crown Court | Cumberland | Major |
| Church Norton; The Mound | The Mount; Pagham Harbour | Sussex | Earthworks |
| Cromwells Castle | Isles of Scilly | Nothing visible | |
| Dartmouth Artillery Castle | Clifton; Stoke Fleming; Sir George Carew's castle | Devon | Major |
| Dartmouth Lambards Bulwark | Clifton; Stoke Fleming; Maiden Fort | Devon | Cropmarks/slight earthworks |
| Deal Castle | Dele; Deale; Dole | Kent | Major |
| Dover; Archcliff Bulwark | bulwark of earth upon the hill behind the pier at Dover | Kent | Nothing visible |
| Dover; Bulwark in the Cliff | Black Bulwark | Kent | Uncertain |
| Dover; Moats Bulwark | Moates; bulwark under Dover Castle; the bulwark subtus castrum Doveri | Kent | Uncertain |
| East Cowes | Old Castle Point | Hampshire, Isle of Wight | Nothing visible |
| East Tilbury Blockhouse, Coalhouse Point | Tylbery | Essex | Cropmarks/slight earthworks |
| Ennor Castle | Evor; Inor; Ynnor; Ivor; Old Town; Sullia | Isles of Scilly | Masonry footings |
| Felixstowe Langer Point | Felixstow; Lunger; Landguard Fort; Langerside | Suffolk | Nothing visible |
| Felixstowe Langer Rood | Felixstow; Lunger; Walton Ferry | Suffolk | Nothing visible |
| Flodden Hill Gun Platforms | Northumberland | Earthworks | |
| Fort Charles, Salcombe | Salcombe Castle; 'The Old Bulwarke' | Devon | Masonry ruins/remnants |
| Fowey Blockhouse | Fowey Castle | Cornwall | Major |
| Gosport Tower | Fort Blockhouse; Lymdens Bulwark; Chiderodd | Hampshire | Nothing visible |
| Gravesend Blockhouse | Cranes Bulwark | Kent | Masonry footings |
| Grays 1 | Essex | Nothing visible | |
| Grays 2 | Essex | Nothing visible | |
| Great Yarmouth coastal defences | St Nicholas Gat; South Mount | Norfolk | Nothing visible |
| Great Yarmouth New Mount | Norfolk | Masonry ruins/remnants | |
| Grimsby Old Blockhouse | Tresco Old Blockhouse | Isles of Scilly | Masonry ruins/remnants |
| Harbottle Castle | Hirbodel; Herbotelle; Harbotle | Northumberland | Masonry footings |
| Harrys Walls | Isles of Scilly | Masonry ruins/remnants | |
| Harwich; The Blockhouse of the Tower | Harwich Castle, The Castle Tower | Essex | Nothing visible |
| Harwich; The Bulwark upon the Hill | Beacon Hill, Queen's Mount, Dunn Bulwark | Essex | Nothing visible |
| Harwich; The Middle House | Middle Bulwark | Essex | Nothing visible |
| Haselworth Castle, Gosport | Hasilworth | Hampshire | Nothing visible |
| Hull Castle, Kingston upon Hull | The Citadel | Yorkshire East Riding | Nothing visible |
| Hurst Castle | Woodward | Hampshire | Major |
| King Charles Castle | Isles of Scilly | Masonry ruins/remnants | |
| Kingston upon Hull, North Blockhouse | Yorkshire East Riding | Nothing visible | |
| Kingston upon Hull, South Blockhouse | Yorkshire East Riding | Nothing visible | |
| Kingswear Castle | Devon | Major | |
| Lindisfarne Castle | Holy Island; Beblow Fort; Belbowe Fort; Biblawe Fort; Beblowe | Durham; North | Major |
| Little Dennis Blockhouse | Cornwall | Major | |
| Lowestoft Coastal Batteries | Lestoffe | Suffolk | Nothing visible |
| Mersea Stone, East Mersea | Mersea Island, Cudmore Grove | Essex | Cropmarks/slight earthworks |
| Milton Blockhouse | Mr Cobhams Bulwark; Mylton | Kent | Nothing visible |
| Mount Edgcumbe Blockhouse | Blockhouse at Garden Battery; Wilderness Point; Barnpool | Cornwall | Major |
| Netley Castle | Abbey Hill; Netly; Letley; Letelege | Hampshire | Masonry ruins/remnants |
| Newhaven Fort | Sussex | Masonry ruins/remnants | |
| Norham Castle | Northam; Norrham | Durham; North | Masonry ruins/remnants |
| Norwich City Wall and Cow Tower | Norwici | Norfolk | Major |
| Pendennis Castle | Pendinas; Pendinant | Cornwall | Major |
| Pevensey Battery 1 | Sussex | Cropmarks/slight earthworks | |
| Pevensey Battery 2 | Sussex | Cropmarks/slight earthworks | |
| Plymouth Blockhouse, Devils Point | Devon | Major | |
| Plymouth Blockhouse, Eastern Kings Point | Millbay West | Devon | Masonry footings |
| Plymouth Blockhouse, Firestone Bay | Winter Villa | Devon | Masonry ruins/remnants |
| Plymouth Blockhouse, Fishers Nose Tower | Lambhay Point; Queen Elizabeth's Tower | Devon | Masonry ruins/remnants |
| Plymouth Drakes Island | St Nicholas Island | Devon | Uncertain |
| Plymouth; The Royal Citadel | Devon | Masonry ruins/remnants | |
| Polruan Blockhouse | Polruan Castle | Cornwall | Major |
| Portland Castle | Dorset | Major | |
| Portsmouth Round Tower | Hampshire | Major | |
| Portsmouth Square Tower | Hampshire | Masonry ruins/remnants | |
| Purfleet | Essex | Nothing visible | |
| Queenborough Castle | Sheppey; Quynborow; Quinborough | Kent | Cropmarks/slight earthworks |
| Rufus Castle | Bow & Arrow; Rufus's; Portlaund | Dorset | Masonry ruins/remnants |
| Sandgate Castle | Sandegate; Folston | Kent | Masonry ruins/remnants |
| Sandown Castle, Isle of Wight | Sandham Castle | Hampshire, Isle of Wight | Nothing visible |
| Sandown Castle, Kent | Sandowne; Sandon | Kent | Masonry footings |
| Sandsfoot Castle, Weymouth | Sandfort; Sandsfort | Dorset | Masonry ruins/remnants |
| Scarborough Bulwark | Yorkshire North Riding | Nothing visible | |
| Sheerness Garrison Point Fort | Kent | Nothing visible | |
| Southampton Town Wall and Gods House Tower | Suthampton; South Castle; The Spur; Millhouse; Bargate; Polymond Tower; Arundel Tower; Windwhistle Tower; Prince Edward Tower; Catchcold Tower | Hampshire | Major |
| Southsea Castle | Palschyd's bulwark | Hampshire | Major |
| Southwold Gun Hill and Higham Bulwark | Hiham Bulwark; Fort Sussex | Suffolk | Nothing visible |
| St Andrews Castle | St Andrews Point; Hamble Castle | Hampshire | Masonry footings |
| St Anns Fort | Norfolk | Masonry footings | |
| St Catherines Castle | Cornwall | Major | |
| St Ives; The Island | The Castle | Cornwall | Nothing visible |
| St Mawes Castle | St Mose; St Marys; St Maudet; Pendinas; La Vousa | Cornwall | Major |
| St Michaels Mount Castle | Cornwall | Masonry footings | |
| St Osyth Blockhouse | Essex | Nothing visible | |
| Star Castle and Garrison Walls | The Garrison, The Hugh; Stella Mariae | Isles of Scilly | Major |
| The Crutch | 'ye croche' | Norfolk | Nothing visible |
| The Downs Beach Fortifications | Great Turf Bulwark, Great White Bulwark | Kent | Nothing visible |
| Tower of London | White Tower | London, City of | Major |
| Tynemouth Castle | Tynemouth Priory; Tiefort; Tynemuth | Northumberland | Major |
| Upnor Castle | Upnore | Kent | Major |
| Walmer Castle | Kent | Major | |
| Wark on Tweed Castle | Carham; Carrum; Werke Sup Twedam | Northumberland | Earthworks |
| Warwick Castle | Warwickshire | Major | |
| West Cowes | Cowes Castle; Cowfort | Hampshire, Isle of Wight | Masonry ruins/remnants |
| West Tilbury Blockhouse, Tilbury Fort | The Hermitage Bulwark; Thermitage Bullwark; Johnes Bulwark; Tylbery | Essex | Nothing visible |
| Worsleys Tower, Sharpnode Point | Sharpenrode; Round Tower Point | Hampshire, Isle of Wight | Nothing visible |
| Yarmouth Castle | Hampshire, Isle of Wight | Major | Aldeburgh; The Mount | Fort Green | Suffolk | Nothing visible | Bacton Battery | Bromholm; Bromely; Bromhill | Norfolk | Nothing visible | Beggars Fort | Cornwall | Nothing visible | Blakeney Harbour Sconce | Blackkey | Norfolk | Nothing visible | Block House Point | Isles of Scilly | Masonry ruins/remnants | Brixham Blockhouse | Devon | Nothing visible | Castle Down | Isles of Scilly | Earthworks | Dartmouth Bastion | Devon | Nothing visible | Dunwich Port Defences | Suffolk | Nothing visible | East Looe | Cornwall | Nothing visible | Fisshehous | Fishhouse | Hampshire, Isle of Wight | Masonry ruins/remnants | Gurnard Luck | Gurnerds fortt | Hampshire, Isle of Wight | Nothing visible | Higham Blockhouse | Heigham; Erith | Kent | Nothing visible | Isle of Wight fortalices | The abbot's mill and other places | Hampshire, Isle of Wight | Nothing visible | Kessingland Coastal Battery | Suffolk | Earthworks | Kingston upon Hull, South End Battery | Yorkshire East Riding | Nothing visible | Kirkley Coastal Battery | Suffolk | Nothing visible | Lindisfarne Steel End | The Heugh | Durham; North | Masonry footings | Lindisfarne; The Palace Supply Base | Durham; North | Masonry ruins/remnants | Minsmere Tudor entrenchments | Suffolk | Nothing visible | Nettlestone point | Nettlesheigh fort | Hampshire, Isle of Wight | Nothing visible | Norham Bastion | Durham; North | Cropmarks/slight earthworks | Old Hythe Battery | Old Hithe | Norfolk | Nothing visible | Pakefield Coastal Battery | Suffolk | Earthworks | Paull Fort | Paull Point Battery | Yorkshire East Riding | Nothing visible | Pevensey Battery 3 | Sussex | Nothing visible | Peveril Point, Swanage | Dorset | Nothing visible | Plymouth Blockhouse, Millbay | Hoe Blockhouse | Devon | Nothing visible | Plymouth Blockhouse, Mount Batten | Devon | Nothing visible | Rockhouse Bank, Bexhill | Sussex | Cropmarks/slight earthworks | Ryde Fort | Hampshire, Isle of Wight | Nothing visible | Sharpenrode Bulwark | Sconce Point; Careys Sconce | Hampshire, Isle of Wight | Nothing visible | St Helens Fort | Hampshire, Isle of Wight | Nothing visible | St Marys; The Folly | Isles of Scilly | Masonry ruins/remnants | Stonehouse Town Defences | Stone Manor, East Stonehouse; Estonehouse | Devon | Masonry ruins/remnants | Studland Castle | Hanfast Point | Dorset | Nothing visible | Swale Ness Fort | Swaleness | Kent | Nothing visible | Tynemouth Northern Tower | Low Light | Northumberland | Nothing visible | Tynemouth Southern Tower | High Light | Durham; County Palatinate of | Nothing visible | Waxham Battery | Norfolk | Nothing visible | Weybourne Fort | Norfolk | Nothing visible | Weybourne Hoop | Black Joy Fort; Waybourne Hope; Cley; Clay | Norfolk | Earthworks | Weymouth Block House | Dorset | Nothing visible | Weymouth Cotton Fort | Dorset | Nothing visible | Winterton Battery | Norfolk | Nothing visible | Yarbridge Battery | Hampshire, Isle of Wight | Nothing visible |
| Bridlington Quay Fort | Yorkshire East Riding | Nothing visible | |
| Burton Upon Trent Abbey | Staffordshire | Nothing visible | |
| Clenchwarton | Norfolk | Cropmarks/slight earthworks | |
| New Fort | Isles of Scilly | Nothing visible | |
| Strangways, Abbotsbury | Dorset | Nothing visible | |
| West Wickham Common | Coney Hall | Kent | Earthworks |