30 St Mary Axe to flight paths for both London City and London Heathrow airports; the revised plan for a lower tower was accepted. The tower's topmost panoramic dome, known as the "lens", recalls the iconic glass dome that covered part of the ground floor of the Baltic Exchange and much of which is now displayed at the National Maritime Museum. "The Gherkin" nickname was applied to the current building at least as long ago as 1999, referring to that plan's highly unorthodox layout and appearance. On 23 August 2000, Deputy Prime Minister John Prescott granted planning permission to construct a building much larger
Baltic Exchange (building) pm, the façade of the Exchange's offices at 24–28 St Mary Axe was partially demolished, and the rest of the building was extensively damaged in a huge Provisional Irish Republican Army (IRA) bomb attack. The one-ton bomb killed three people whilst 91 were wounded. The bombing came a day after the General Election. Architectural conservationists wanted to reconstruct what remained from the bombing, as it was the last remaining exchange floor in the City of London. English Heritage, the government's statutory conservation adviser, and the City of London Corporation insisted that any redevelopment must restore the building's old façade onto