A challenger to The Shards title as the tallest skyscraper in the UK is moving forward with plans to construct a new building designed by Eric Parry Architects that will equal its record height of 309.6 meters (or 1,015.75 feet). The height is limited by aviation safety rules for the City of London, where the planned 1 Undershaft will soon begin construction towards an anticipated early-2030s completion.As wasfirst reported by The Guardian, "On completion, 1 Undershaft, which is being built on the site occupied by insurer Avivas former headquarters, will provide almost 13% of the office space required in the City of London to 2040."Image: DBOX/Eric Parry ArchitectsImage: DBOX/Eric Parry Architects