Close Examination: Fakes, Mistakes and Discoveries London, The National Gallery, 30 June – 12 September Reviewed by David Maskill This exhibition, currently showing at London’s National Gallery, is one of the highlights of the summer season. As art institutions struggle with the effects of the recession, blockbusters that rely on extensive and costly loans and on the attendant crowds to pay for them have been in decline in recent times. If this exhibition is anything to go by, this may not be such a bad thing. Drawn mostly from the…