Willis Building (London) 2004 and 2008 under the management of Mace and represented a significant addition to the City of London skyline, becoming its fourth-tallest building after Tower 42, 30 St Mary Axe and CityPoint. The core was topped out in July 2006 and the steelwork completed in September that year. Cladding began in July 2006 and the structure was externally completed by June 2007. It was internally fitted out and officially opened in April 2008. The building was the first in a wave of new tall towers for London's primary financial district. Others included The Pinnacle, the Leadenhall Building and the Heron
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