<P> However, with Halabi's property empire in serious trouble due to the housing market's collapse, the project seems to have stalled . English Heritage has placed it on the "At Risk register" and the house needs urgent work on the roof and chimneys . There is concern that weather will penetrate to the interiors, considered among the finest examples of Victorian design and craftsmanship in Britain . Halabi's property company, Buckingham Securities Holdings, was also proposing to develop the In & Out Club at 79--81 Piccadilly, London, also known as Cambridge House, before it became the Naval and Military Club and once occupied by Lord Palmerston . The intention was to turn both properties into Europe's first six - star hotels, one located in town and the other to be the sister Country Manor hotel with 36 hole private golf club . The original architects, EPR were replaced by AFR in 2005 but the development stalled in 2007 . In 2004 Hotel Design Inc were retained as interior designers for both projects leading to a 2005 launch event for the marketing of the properties as a private members' club with hotel facilities (the PM Club). </P> <P> The latest proposal after the sister, Piccadilly property was sold to the Rueben Brothers in 2009, was to renovate the original Mentmore Towers building and not construct the new extension containing guest - room suites, conference facilities and a large spa . </P> <P> Much of the historic park was sold off in 1944 and reverted to agricultural use before becoming the Mentmore Golf and Country Club, established in 1992, which has two eighteen hole golf courses, the Rothschild Course and the Rosebery Course . Although in the same ownership, Mentmore Towers and its grounds and Mentmore Golf and Country Club are quite separate . </P> <P> The house has appeared in many films, including Terry Gilliam's Brazil (1985), Slipstream (1989), Stanley Kubrick's Eyes Wide Shut (1999), Philip Kaufman's Marquis de Sade biographical film Quills (2000), The Mummy Returns (2001), Ali G Indahouse (2002), Johnny English (2003), and Christopher Nolan's Batman Begins (2005), where it was used as the gothic Wayne Manor . </P>

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