Sir Ross Cranston’s ruling that the CS11 cycle route is unlawful in its current format has been upheld by the Court of Appeal.
The court has also denied TfL permission to make any further appeals.
The ruling now means that TfL will have to start the process of re-designing the controversial cycle super-highway.
In the original ruling, which took place in September 2018, Westminster Council were successful after filing a judicial review at the High Court.
Sir Ross Cranston's judgement at the initial hearing focused on the fact that TfLs plan to start work at Swiss Cottage before they had consent for the entirety of the scheme was unlawful.
It was reported in the Ham and High that Westminster Council have deep concerns over the traffic congestion that CS11 may cause, although they have stated that they fully support safe cycling.
TfL have expressed disappointment at the decision and have stated that they remain committed to improving walking and cycling in the area.