Brownsea Island by third parties, is owned by the National Trust. Most of the buildings are situated near the small landing stage. The northern portion of the island is a Nature Reserve managed by Dorset Wildlife Trust and an important habitat for birds; this part of the island has limited public access. A small portion to the southeast of the island, along with Brownsea Castle, is leased to the John Lewis Partnership for use as a holiday hotel for staff, and is not open to the public. The island forms part of the Studland civil parish in the Purbeck local government district.
Brownsea Island the castle and records suggest that he spent £50,000 on enhancing the island's gardens. Sir Augustus John Foster, a retired British diplomat, bought the island in 1840. Foster experienced bouts of depression and died in Brownsea Castle in 1848 when he slit his throat. In 1852 Brownsea was again up for sale and was sold for £13,000. It was purchased by William Waugh, a former Colonel in the British Army in the belief he could exploit the white clay deposits on the island to manufacture high-quality porcelain. A three-storey pottery was built in south-west corner of the island together with