Not reading the last hundred posts, but I was trying to work out why City say the Rules are null and void (not a phrase in the judgment).
The overall conclusions (592-602) list the challenges where City succeeded and those ("all others") that failed, which sounds like they just have to tinker with the Rules.
But p. 164 is the judgment (with its ABD mistake - should be AND):
FOR THE ABOVE REASONS WE, SIR NIGEL TEARE, CHRISTOPHER VAJDA KC AND LORD DYSON HEREBY AWARD ABD DECLARE:
(i) that the APT Rules are unlawful
(ii) that the Amended APT Rules are unlawful
(iii) that APT Rules and the Amended APT Rules are unlawful
So I presume that if they're unlawful, they are all null and void.