A key feature of the legacy is what becomes of the new 2012 venues, and Boris Johnson quite rightly took a keen interest in this from the outset. There can be no justification for an 80,000-seat stadium in east London or a 20,000-seat aquatics centre that would be at capacity perhaps once a decade for a world swimming championships. Legacy plans will need refining and the London Development Agency will need to take the lead on that.