London Mayor Boris Johnson says he will overrule his council's rejection of a a 63-storey tower block in East London's Docklands called Columbus Tower.
The council is concerned the the tower will block daylight to nearby homes and have an adverse impact on nearby listed buildings and a conservation area.
Johnson, however, said Columbus Tower clearly meets the test of a planning application of major significance to the whole of London.
The Columbus Tower was designed by Mark Weintraub Architecture and Design (MWA&D) architects to replace a four-storey tower on the site, which is on West India Quay.
The proposed tower include 31,000m² of office space, a 30,000m² hotel and over 70 apartments.