Denny Island (; ) is a small uninhabited rocky

island An island or isle is a piece of land, distinct from a continent, completely surrounded by water. There are continental islands, which were formed by being split from a continent by plate tectonics, and oceanic islands, which have never been ...

of , with scrub vegetation, in the

Severn Estuary The Severn Estuary () is the estuary of the River Severn, flowing into the Bristol Channel between South West England (from North Somerset, Bristol and South Gloucestershire) and South Wales (from Cardiff, Newport to Monmouthshire). Its very h ...

. Its rocky southern foreshore marks the boundary between

England England is a Countries of the United Kingdom, country that is part of the United Kingdom. It is located on the island of Great Britain, of which it covers about 62%, and List of islands of England, more than 100 smaller adjacent islands. It ...

and

Wales Wales ( ) is a Countries of the United Kingdom, country that is part of the United Kingdom. It is bordered by the Irish Sea to the north and west, England to the England–Wales border, east, the Bristol Channel to the south, and the Celtic ...

. Above

high water mark A high water mark is a point that represents the maximum rise of a body of water over land. Such a mark is often the result of a flood, but high water marks may reflect an all-time high, an annual high (highest level to which water rose tha ...

, the island is reckoned administratively to

Monmouthshire Monmouthshire ( ; ) is a Principal areas of Wales, county in the South East Wales, south east of Wales. It borders Powys to the north; the English counties of Herefordshire and Gloucestershire to the north and east; the Severn Estuary to the s ...

South Wales South Wales ( ) is a Regions of Wales, loosely defined region of Wales bordered by England to the east and mid Wales to the north. Generally considered to include the Historic counties of Wales, historic counties of Glamorgan and Monmouthshire ( ...

. The island also marks the north-western limit of the City of Bristol's water boundary in the Severn estuary. It is located approximately three miles north of Portishead, midway between Redwick in Wales and

Avonmouth Avonmouth ( ) is a port and outer suburb of Bristol, England, on the north bank of the mouth of the River Avon and the eastern shore of the Severn Estuary. Part of the Port of Bristol, Avonmouth Docks is important to the region's maritime eco ...

in England. It is surrounded by sandbanks known as the Welsh Grounds. Its foreshore area changes dramatically according to the state of the tide, because

tides Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon (and to a much lesser extent, the Sun) and are also caused by the Earth and Moon orbiting one another. Tide tables ...

in the

estuary An estuary is a partially enclosed coastal body of brackish water with one or more rivers or streams flowing into it, and with a free connection to the open sea. Estuaries form a transition zone between river environments and maritime enviro ...

and

Bristol Channel The Bristol Channel (, literal translation: "Severn Sea") is a major inlet in the island of Great Britain, separating South Wales (from Pembrokeshire to the Vale of Glamorgan) and South West England (from Devon to North Somerset). It extends ...

are amongst the highest in the world, reaching at the spring equinox. It is known as a nesting-place for

gull Gulls, or colloquially seagulls, are seabirds of the subfamily Larinae. They are most closely related to terns and skimmers, distantly related to auks, and even more distantly related to waders. Until the 21st century, most gulls were placed ...

cormorant Phalacrocoracidae is a family of approximately 40 species of aquatic birds commonly known as cormorants and shags. Several different classifications of the family have been proposed, but in 2021 the International Ornithologists' Union (IOU) ado ...

s and other

seabird Seabirds (also known as marine birds) are birds that are adaptation, adapted to life within the marine ecosystem, marine environment. While seabirds vary greatly in lifestyle, behaviour and physiology, they often exhibit striking convergent ...

s, which are regularly seen and ringed there.

History

Denny Island appears in the historical record for the first time as ''Dunye'', in the charter recording the creation of the county of Bristol in 1373. This suggests that the name means, in

Old English Old English ( or , or ), or Anglo-Saxon, is the earliest recorded form of the English language, spoken in England and southern and eastern Scotland in the Early Middle Ages. It developed from the languages brought to Great Britain by Anglo-S ...

, 'island shaped like a down (i.e. a hill with a rounded profile)'. It gives its name to the Denny Island Fault Zone, a part of the Avon-Solent

Fracture zone A fracture zone is a linear feature on the ocean floor—often hundreds, even thousands of kilometers long—resulting from the action of offset mid-ocean ridge axis segments. They are a consequence of plate tectonics. Lithospheric plates on eit ...

. On the 21st of September 1995, Neil Carter from Portishead spent 3 nights on Denny Island to raise money for the

RNLI The Royal National Lifeboat Institution (RNLI) is the largest of the lifeboat services operating around the coasts of the United Kingdom, Ireland, the Channel Islands, and the Isle of Man, as well as on some inland waterways. Founded in 1824 ...

. 23 years later, on the 21st of September 2018, he slept overnight on the island to raise money for the maintenance of the Black Nore Lighthouse by the Black Nore Lighthouse Trust. In 2004, the island was subject to an unsuccessful appeal under Section 6(1) of the

Countryside and Rights of Way Act 2000 The Countryside and Rights of Way Act 2000 (c. 37), also known as the CRoW Act and "Right to Roam" Act, is a United Kingdom Act of Parliament affecting England and Wales which came into force on 30 November 2000. Right to roam The Act impleme ...

against it appearing on a map of registered common land. On the 13th of November 2017, Lave net fishermen from

claimed to have discovered a large amount of

plastic Plastics are a wide range of synthetic polymers, synthetic or Semisynthesis, semisynthetic materials composed primarily of Polymer, polymers. Their defining characteristic, Plasticity (physics), plasticity, allows them to be Injection moulding ...

, some of which was used as nesting material by

seabirds Seabirds (also known as marine birds) are birds that are adapted to life within the marine environment. While seabirds vary greatly in lifestyle, behaviour and physiology, they often exhibit striking convergent evolution, as the same envi ...

, a bomb from

WW2 World War II or the Second World War (1 September 1939 – 2 September 1945) was a global conflict between two coalitions: the Allies and the Axis powers. Nearly all of the world's countries participated, with many nations mobilising ...

, and several cannon balls after visiting Denny Island.

References

External links

Images of Denny Island from www.geograph.co.uk
{{Commons category, Denny Island, Monmouthshire, Denny Island Islands of the Bristol Channel Uninhabited islands of Wales Islands of Monmouthshire Islands of the River Severn River islands of Wales