This appears to use Lambeth’s work as its case study. I can’t find anything that sets out the scores but Wells scores highest in the borough.
This part walks through how to prioritise your low traffic neighbourhoods based on where the approach will have the greatest impact, rather than where it will be easiest.
www.sustrans.org.uk
As per my post above, there is clearly a need for safe cycling in the area to meet Lambeth’s transport strategy objectives, and those that TfL passes down to them. How else if not valley road?