London practice Avery Associates Architects has unveiled their designs for No.1 Undershaft, a 270-metre tall office tower directly adjacent to Rogers Stirk Harbour + Partners' Cheesegrater in the City of London's central skyscraper cluster. The building is currently planned to be the tallest in this cluster and the second-tallest in London (after the Shard) - notwithstanding an as-yet-unrevealed plan for the site of the scrapped Pinnacle project which could potentially supersede it.
