| BRISTOLCHANNEL | Waterway between England and Wales (7,7) |
| ENGLISHCHANNEL | Waterway between England and France (7,7) |
| CHANNEL | English ___ (waterway between England and France) |
| STROFBELLEISLE | Waterway between mainland Labrador and newfoundland island: abbr. + wd. + wd. + wd. |
| VALLEY | Wye -; AONB on the border between England and Wales, site of Tintern Abbey, Goodrich Castle, Symonds Yat and "the town of books" (6) |
| OFFASDYKE | Earthworks between England and Wales (5,4) |
| SEVERN | ____ Bridge, motorway suspension bridge between England and Wales (6) |
| LUNDY | Island in the Bristol Channel between England and Wales (5) |
| WYE | River flowing between England and Wales |
| SEVERNBRIDGE | Poles always positioned in game between England and Wales (6,6) |
| DYKE | Offa's ___ runs along the border between England and Wales. (4) |
| OFFA | King of Mercia who organised the construction of an earthwork between England and Wales (4) |
| MARCH | Military-style walk; move made by a chess piece; or, a border, such as one between England and Wales (5) |
| BRISTOL | Which channel between England and Wales narrows into the Severn estuary? (7) |
| CHANNELSURFING | Switching sides in main event between England and France? |
| BASSSTRAIT | Waterway between Tasmania and Australia |
| NORTHSEA | Waterway between the United Kingdom and Denmark |
| ADEN | Waterway between Yemen and Somalia, Gulf of ... |
| STYX | Waterway between Earth and Hades |
| GRANDUNIONCANAL | Manmade waterway between London and Birmingham (5,5,5) |
