Jeremy, as you are concerned about the accuracy of the chiswickw4 report, it says, "Gilligan was widely reported to have been furious when Sadiq Khan shelved Cycleway 9".
Perhaps you can find where this was 'widely reported'. I certainly can't. Not to mention the claim that Cycleway 9 was 'shelved', which it wasn't.
After the end of Johnson's mayoralty in 2016, Gilligan had no involvement at all and yet that was when C9 went out to consultation, the decision was made to proceed and construction started.
Building him up as the person pulling all the strings is just wishful thinking.
You can get an overview of the designs in the documentation for the 3 September 2019 cabinet meeting on the Hounslow website. TfL did also publish the detailed engineering designs as a FOI on their website and I downloaded them from there but frankly, I couldn't be bothered looking for these again so you can look for yourself or even do another FOI.
As a sneak preview, here is part of one of the designs.
Michael Robinson ● 1532d