The owner of London's landmark "Can of Ham" building has rejected a higher offer from Blackstone of about 330 million pounds ($426.92 million) for the property, with Nuveen betting on an improving appetite for European real estate assets, a source close to the matter said. The 21-storey building at 70 St Mary's Axe is one of the few big-ticket office properties put up for sale in Europe in the past few years after the market was hit by post-pandemic changing working patterns and higher borrowing costs. The "Can of Ham" sale is one of several in Europe being tracked as a test of whether buyers and sellers can agree on price after office sale volumes slumped last year to their lowest level since 2009.