More than 65,000 cubic metres of soil was excavated to form the basement of 1 Broadgate. By removing so much soil, we are revealing London clay which may not have seen the light of day for millions of years, giving us a window into the past. To see how this London clay was formed, we need to go back more than 50 million years –
- 56 million years ago, where London is situated now, the area would have been a sub-tropical forest on the edge of a sea. Changes in the sea level during this period resulted in much of the land being submerged under water, depositing London clay up to depths of around 150 metres.
- By 25 million years ago, the sea levels had dropped, and long periods of erosion worked away layers of clay before the Anglican Ice Age brought in huge layers of ice 425,000 years ago.
- The first iteration of London itself, Londinium, was then formed by the Romans in 40AD, becoming the capital of Roman Britain. The city was bounded by a wall with seven main gates. The 1 Broadgate site would have been situated just outside of Bishopsgate, on the banks of the lost river Walbrook.
- In medieval times (1247) the site would have been situated next to the priory and hospital of St Mary of Bethlehem, which later become the psychiatric hospital, Bedlam.
- Moving into Victorian Britain and the Industrial Revolution, the site become home to Broad Street Station from 1865 until it was closed and demolished in 1986.
- Following the demolition of the station, the Broadgate campus was formed as part of a new development looking to provide office space.
- Fast forward to the present day, and the new Broadgate campus is aiming to become a 7-day destination, not just for office space, but for retail and entertainment.
1 Broadgate timelapse
1 Broadgate - Lowering the Fulcrum
The Broadgate Framework
Sector: Commercial, Leisure, RetailLocation: London
Engineering Excellence at 100 Liverpool StreetSector: CommercialLocation: London
Refurbishing Grade II listed 1 Finsbury AvenueSector: CommercialLocation: London, London