Graham Wildin inside the leisure centre he has built for himself and his family in his back garden (file pic). A millionaire who illegally built 'Britain's best man cave' in his garden could face jail - after the latest deadline to tear it down expired today (Thurs). Wealthy accountant Graham Wildin, 69, has been embroiled in a long-running planning row after he installed a bowling alley, cinema, squash courts, private casino and bar in the plush extension eight years ago. He didn't have the correct planning permission and a lengthy legal fight followed ending with a High Court judge handing down an injunction in 2018. He was initially given until the end of April 2020 to remove the 10,000sq/ft complex.