Green Island (Dorset) Green Island (Dorset) Green Island is an island in Poole Harbour in the English county of Dorset. It lies in the central south part of the harbour, south of Brownsea Island and Furzey Island. The island is an Area of Outstanding Natural Beauty (AONB), Site of Special Scientific Interest (SSSI) and Special Protection Area (SPA). The island covers approximately at low tide while the central raised part of the island is approximately . The island is covered in extensive woodland in the centre, made up of Scots pine with several small zones of heathland. The island also has a large
Brownsea Island instigator of Pride's Purge– the only military coup d'état in English history – was stationed on the island in 1654. Sir Robert Clayton, a Lord Mayor of the City of London and wealthy merchant became owner in the mid-1650s and after his death in 1707 the island was sold to William Benson, a Whig Member of Parliament and architect. He converted the castle into a residence and was responsible for introducing many varieties of trees to the island. In 1765 Sir Humphrey Sturt, a local landowner and MP purchased the island, which in turn passed to his sons. Sturt expanded