Safe as houses: the KGB-proof mansion - Oligarch builds Surrey fortress May 6, 2007 by Mark Hollingsworth and Jack Grimston FOR an oligarch nervous about the future, it is the ideal bolthole. A Russian billionaire is spending tens of millions of pounds building a high-security “KGB-proof” mansion in Surrey. Peter Aven, head of the biggest private bank in Russia, is said by locals to have surrounded his 8.5acre property on the Wentworth estate near Virginia Water with “intelligent” electronic fencing and incorporated a bombproof shelter in the design. It also has a two-storey hexagonal guardhouse by the main entrance. The...