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D’Oyly Carte island is a two-acre private island in the Thames. Wikipedia tells me that ‘Before 1890 the island was known as Folly Eyot. The impresario Richard D'Oyly Carte bought the island in about 1890 and built the 13-bedroom Eyot House on the property, completed in 1898. His widow sold the island, and it was last sold in 2021. Richard D'Oyly Carte was the producer of the Gilbert and Sullivan comic operas from 1875 to 1896, founder of the Savoy Theatre’ The current owner is restoring the property.
A single-span footbridge built in 1964 comprising a high arch of a single steel box girder provides access to the house. Previously, the island was reached by pulling oneself across the river on a chain ferry.