Campaigners say ‘giveaway’ West Ham stadium deal adds to failure of authorties to honour 2012 Games’ legacy More than £400m diverted from supporting communities in need across the UK to help fund the London 2012 Olympics has yet to be returned, and the shortfall has raised questions about the Games’ legacy. With the 2016 Rio Olympics now underway, there are calls for the new mayor of London and the prime minister to ensure the cash – taken…