atlantic ocean aust severn powerline crossing avonmouth avonmouth docks barnstaple barry island barry railway company bay bay of fundy bewdley bideford bridgnorth bridgwater bay bristol bude burnham-on-sea caldey island carboniferous cardiff cardiff bay cardiff bay barrage carmarthenshire celtic sea chepstow clevedon coalport canal combe martin coombe hill canal coral cornwall croyde devon droitwich canal eastern canada england english bridge exmoor flat holm flood geographic coordinate system geological society of america glamorgan gloucester gloucester and sharpness canal gloucestershire gower peninsula great britain hangman cliffs hartland point herefordshire and gloucestershire canal heritage coast ilfracombe ironbridge langland bay laugharne limestone list of crossings of the river severn llanidloes llantwit major lundy meteorology minehead monmouthshire mumbles national nature reserve newport north devon over bridge oxwich bay ps waverley p and a campbell paddle steamer pembrokeshire porlock port of bristol powys rhossili river clyde river great ouse river nene river parrett river severn river spey river tay river teme river tern river thames river trent river tweed river usk river vyrnwy river wye royal portbury dock seaweed second severn crossing secretary of state for the environment severn area rescue association severn barrage severn bridge severn estuary severn tunnel severn crossing shrewsbury shropshire somerset south pembrokeshire south wales south west england sponge stackpole staffordshire and worcestershire canal steep holm stourport-on-severn stroudwater navigation surfing swansea tewkesbury thames and severn canal the iron bridge tidal range tide tsunami vale of glamorgan wader wales watchet welsh language welshpool weston-super-mare woolacombe worcester worcester and birmingham canal worcestershire