restored again in 1975 and turned into a museum. In 1999 a grant from the Heritage Lottery Fund enabled the Patent sails to be restored to working order. The museum, initially only on one floor but extended to two in 1999, depicts the story of windmills from their early origins up to the present day, using models, examples of machinery and tools of the trade. A room from one of the smaller apartments is preserved to illustrate how the building was used as accommodation. It is no longer a working mill, but a finely detailed model shows the machinery as it was in its working days. On 2 August 2015, a sail fell from the mill, damaging the base below. The collapse of the sail was caused by long-term water ingress. The sails were restored in 2016. Description Wimbledon Windmill was built as a hollow post mill, with the drive to the stones passing through the centre of the main post. It was a hollow post mill for its entire working life, but was rebuilt as a smock mill when it was preserved in 1893. The mill has double Patent sails and is winded by a fantail. The windmill has an octagonal brick base of two stories, above which is a conical tower formerly housing the main post. The cast-iron windshaft carries four double Patent sails, and a diameter cast iron Brake Wheel with about 60 wooden cogs, which formerly drove the cast-iron Wallower carried on a cast iron Upright Shaft. A Spur Wheel at the lower end of the upright shaft would have driven the millstones on the upper floor of the mill. The conversion from Hollow Post mill to a Smock mill was done by Sanderson's, the Louth millwrights. Millers Dann – 1840 A Halloway – 1858 John Marsh – 1860s Culture and media The Mill House of Wimbledon Windmill is where Robert Baden-Powell stayed in 1902 and wrote parts of Scouting for Boys, which was published in 1908. Wimbledon Windmill also featured in the Doctor Who episode titled The Massacre of St Bartholomew's Eve (Bell of Doom) which was filmed in 1966. It also appears in the 1952 film "Hammer the Toff". It also appears briefly in the 1970 Peter Sellers Film Hoffman. Public access The windmill is now a museum, detailing its own history, as well as the history of windmills in general. The museum is