my reply was more or less this but i put it more in my own words :
Dear Transport for London,
I challenge liability on the basis of a procedural impropriety, specifically it is unlawful for you to serve a postal PCN in these circumstances. I refer you to the red route panel decision in Commercial Plant Services Ltd & others v Transport for London (2230060716, 25 May 2023) published at
www.londontribunals.gov.uk/sites/default/files/keycases/Red%20Route%20Panel%20Decision.pdfIt follows that the PCN must be cancelled.
Yours faithfully,
I noticed someone quoted that TFL need traffic to be kept moving bt where I parked is a parking bay and will never be a lane for driving along ....
I always park there, thought you could at any time on weekends, didnt realise it includes saturdays!