Certain |
Possible |
Questionable Doubtful |
Rejected |
|
Confidence is a statement of the site as a medieval fortification or palace |
| Name | Alternative Name(s) | County | Remains |
| Fowey Blockhouse | Fowey Castle | Cornwall | Major | Penryn Harbour Chain | Cornwall | Nothing visible |
| Polruan Blockhouse | Polruan Castle | Cornwall | Major |
| Dartmouth Gommerock Harbour Chain | Devon | Cropmarks/slight earthworks | |
| Plymouth Blockhouse and Harbour Chain | Devon | Nothing visible | |
| Hartlepool Chain Towers | Durham; County Palatinate of | Uncertain | |
| East Cowes | Old Castle Point | Hampshire | Nothing visible |
| Gosport Tower | Fort Blockhouse; Lymdens Bulwark; Chiderodd | Hampshire | Nothing visible |
| Portsmouth Round Tower | Hampshire | Major | |
| Norwich City Wall and Cow Tower | Norwici | Norfolk | Major |
| York City Wall | Bootham Bar; Micklegate Bar; Walmgate Bar; Fishergate Bar; Monk Bar; Castlegate Postern; Fishergate Postern; Layerthorpe Postern; Skeldergate Postern | Yorkshire Ainsty & York | Major |
| Kingston upon Hull, South End chain tower | Yorkshire East Riding | Nothing visible |