The Isles of Scilly ( / s ɪ l i / ; Cornish : Syllan gold Enesek Syllan ) are an archipelago off the southwestern tip of Cornwall . One of the islands, St Agnes , is the most southerly point in both England and the United Kingdom , being over 4 miles (6.4 km) further south than the most southerly point of the British mainland at Lizard Point .
Lundy is the largest island in the Bristol Channel . It lies 12 miles (19 km) off the coast of Devon , England,  in the district of Torridge , about a third of the distance from Devon, England to South Wales . Lundy gives its name to a British sea area and is one of the islands of England .  Lundy has-been designated by Natural England as national character area 159, one of England’s natural areas . 
Wallasea Island lies in Essex , England . It is bound to the north by the River Crouch , to the south by the River Roach , and to the west by Paglesham Pool and the narrow Paglesham Creek . The population of the Island is included in the civil parish of Canewdon .
Much of the island is farmland , and wheat is the main crop. A small settlement at its western end is linked to a campsite and marina . It is linked by ferry to Burnham-on-Crouch .
The Isle of Walney , also known as Walney Island , is an island off the west coast of England , at the western end of Morecambe Bay . It forms part of the town of Barrow-in-Furness , and it is separated from mainland Barrow by Walney Channel, a narrow channel which is spanned by the Jubilee Bridge . Walney is the largest island of the Furness Islands group, both in population and size, and is the largest in the Irish Sea . Its population at the 2011 UK Census was 10,651, distributed evenly across the island’s two Wards ofWalney North and Walney South . 
Mersea Island / m ɜːr z i /  is an island in Essex , England, in the Blackwater and Colne estuaries to the south-east of Colchester . Its name comes from the Old English word meresig , meaning “island of the pool”. The island is divided into two main areas, West Mersea and East Mersea , and connected to the mainland by the Strood, a cause that can flood at high tide.
Canvey Island is a civil parish and reclaimed island in the Thames estuary in Essex , England. It has an area of 7.12 square miles (18.44 km 2 ) and a population of 38,170. Essex by a network of creeks. The only exception is the flood of exceptional tides, but it has been inhabited since the Roman invasion of Britain.
Portsea Island is a flat, low-lying island measuring 24 square kilometers (9 sq mi) in area, just off the southern coast of England . The island is located within the traditional county of Hampshire and contains the vast majority of Portsmouth .
Portsea Island has the third largest population of the British Isles after the mainlands of Great Britain and Ireland ; it also has the highest population density.
Foulness ( / f aʊ the n ɛ s / ) is an island on the east coast of Essex in England , qui is separated from the mainland by narrow creeks . In the 2001 census, the usually resident population was 212, living in the settlements of Churchend and Courtsend, at the end of the island. The population reduced to 151 at the 2011 Census.  The island has a general store and post office . The George and Dragon Churchend pub closed in 2007, while the church closed in May 2010.
Hayling Island is an island off the south coast of England, in the borough of Havant in the county of Hampshire , near Portsmouth .
The Isle of Sheppey is an island off the northern coast of Kent , England in the Thames Estuary , some 46 miles (74 km) to the east of London . It has an area of 36 square miles (93 km 2 ). The island forms part of the local government district of Swale . Sheppey is derived from the ancient Saxon “Sceapige”, meaning isle of sheep, and even today the extensive marshes which make up a large proportion of the island.
The Isle of Wight / w aɪ t / (Referred to informally as ‘IOW’  or ‘The Island’) is a county and the Largest and second-most populous island in England. It is in the English Channel , about 2 miles (3.2 km) off the coast of Hampshire , separated by the Solent . The island-have beens HAS resorts That holiday destinations since Victorian times , and is Known for icts mild climate, coastal scenery, and verdant landscape of fields, downland and chines .
Ireland ( / aɪər the ə n d / ( listen ) ; Irish : Éire [eːɾʲə] ( listen ) ; Ulster-Scots : Airlann [ɑːrlən] ) is an island in the North Atlantic . It is separated from Great Britain by the North Channel , the Irish Sea , and St George’s Channel . Ireland is the second-largest island of the British Isles , thethird-largest in Europe , and the twentieth-largest on Earth . 
Great Britain , also known as Britain , is a large island in the north Atlantic Ocean off the northwest coast of continental Europe . With an area of 209,331 km 2 (80,823 sq mi), Great Britain is the largest of the British Isles , the largest European island , and the ninth-largest island in the world .  [note 1] In 2011 the island had a population of about 61 million people, making it the world’s third-most populous island after Java in Indonesia and Honshu in Japan .  The island of Ireland is situated in the west of theisland, and together with theseislands , including the British Isles archipelago.