As part of efforts to reduce road danger within central London, Transport for London have said new 20mph speed restrictions, affecting Victoria Embankment, should be operating by early 2020.
After a consultation period in the summer of 2019, in which positive feedback was given, TfL have published a Consultation Report which outlines the reasons for the change and the areas which are likely to be impacted. This can be found here: consultations.tfl.gov.uk/streets/20
To try and minimise disruption as much as possible the new speed limit signs will be introduced first, with road markings and construction of raised crossings to follow. TfL have said they intend to complete work overnight to minimise the impact on road users.