Thanks for your question Seabag. This river crossing has been outlined in TfL's Connecting the Capital report. See more here for a map of the new river crossings proposed for London - https://tfl.gov.uk/corporate/publications-and-reports/new-river-crossings-for-london Sadiq Khan also highlighted how important he considers the crossing when questioned by MP Caroline Pidgeon on May 25th 2016 for Mayor's Question time. He revealed that the work he has tasked TfL to undertake will consider the timescales for the different options to deliver the crossing as quickly as possible. More information can be found here - http://www.carolinepidgeon.org/node/1391 Kitschenette is right about how supporting this bridge design will encourage it to be built. Public support, which has been particularly visible on Social Media, has played a vital role in helping reForm and Elliott Wood prove how popular the design is and continues to be instrumental in the process of making it a reality at this stage. There are currently no other designs being proposed for this crossing. To find out more information about the background to the bridge design and find out more about the positive impact it will have on both sides of the river, see the interview on reForm's website, which was featured on the NLA website - http://www.reform-architects.london/nla-peoples-choice-award/ For more information about the continuing NLA exhibition, which runs until the 5th of October, see here- http://newlondonarchitecture.org/programme/exhibitions/2016/new-london-2016--londons-best-new-projects