Projection of the cluster if all approved schemes were builtHow the cluster looked in 20151/3show captionThe City of London has unveiled images showing how the Square Miles main cluster of towers would look if all approved schemes were built.Several major schemes have been approved in recent months including Stanhope and Arolands 74-storey 1 Undershaft, designed by Eric Parry, which will be the tallest building in the City and the joint tallest in the country with the Shard when built.RSHPs 54-storey 99 Bishopsgate, designed for Brookfield, was also approved by the Corporation in January, while a row of towers along Gracechurch Street have been signed off within the last few years.> Also read:RSHPs new tower at 99 Bishopsgate approved with plans to start construction next yearThe CGIs, which contain all major office schemes which the City has approved or resolved to approve over the past decade, show the scale of the transformation that could come to the cluster over the next few years.The Citys policy chairman Chris Hayward said: The City of London is the greatest city in the world. A global economic powerhouse, an ancient city and a centre of collaboration and innovation for the hundreds of thousands of people who work here every day.These new images clearly illustrate the ever-changing nature of Londons incredible skyline and that the Square Miles real estate sector is robust and thriving.The City has a target to build more than 1.2 million sq m of office space by 2040, much of which is expected to be contained within new buildings in the cluster.