Been used in antiquity

The Garden Bridge project was an unsuccessful private proposal for a pedestrian bridge over the River Thames in London, England. Originally an idea of Joanna Lumley, and strongly supported by then-Mayor of London Boris Johnson, the designer Thomas Heatherwick worked with Arup Group on a proposal by Transport for London (TfL) for a new bridge across the Thames between Waterloo Bridge and Blackfriars Bridge. The proposed concrete, steel, cupronickel clad structure was intended to carry pedestrians, with no cycles or other vehicles. It was to have been located some 200 metres (660 ft) from Waterloo Bridge and 300 m (980 ft) from Blackfriars Bridge, and have included some areas of planting. The project was to include a commercial building, built on former green space at the southern end of the bridge. The bridge was intended to be funded by raising over £140 million of private money and £60 million of promised public money, of which £30m was from Transport for London and £30m from the Department for Transport, adding up to projected funding of over £200m. In January 2017, the trustees of the prospective owner of the bridge, the Garden Bridge Trust, stated that costs would \"substantially exceed\" an earlier revised total of £185m and, in April 2017, a report by Margaret Hodge MP concluded, on the basis of the Garden Bridge Trust's own evidence, that the cost would be over £200m.