I don’t think that anyone has shown this plan beside an actual R/R1 (or however they were designated) but this Ian Brady photo shows the plan to be a ’never was’. Note the 4 standard R windows and 2 smaller windows as opposed to, in the plan, 5 R class windows and one even smaller window.
Regarding the debate about whether there was a bulkhead proposed in the ‘never was’, a plan of an actual R would show how the bulkhead was depicted.
Regards,
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