Tower 42 Skyscraper.
Tower 42 became London's Tallest Building for 10 years from 1981 to 1991 until the One Canada Square was topped out surpassing the height of this tower, In the time of humans, The tower suffered severe damage and had to be entirely reclad and internally refurbished due to the April 1993 Bishopgate Bombing, By the end of 2013, Both Two towers. (Bishopsgate Tower, and Leadenhall Building.) will surpass the height of Tower 42.
5 Years After People: The windows have broken down raining down on roads.
100 Years After People: The floors began to collapse in the interior leaving everything but the core, The core still stands.
150 Years After People: The core collapses due to strong winds and deterioration.
300 Years After People: Most remains of the structure are now gone, Collapses from other buildings leaving the Gherkin standing as the tallest building in London.