Sadiq Khan costs taxpayers £10m in row over Thames tunnel contract Transport for London settles after accusations of botched procurement process for Silvertown Tunnel 28 May 2021 • 6:11pm Sadiq Khan has been forced to pay more than £10m of taxpayer cash to a consortium of builders to settle a long-running row over a flagship road tunnel under the Thames. Transport for London - chaired by Mr Khan, the city's mayor - has struck a deal with the Silver Thames Connect group following accusations of a botched procurement process for the Silvertown Tunnel in east London. Sources said that TfL has agreed to pay more than £10m of public funds to the consortium, which includes the companies Hochtief, Dragados and Iridium Concesiones de Infraestructuras, after it launched a legal challenge when the contract was awarded to a rival.