Photo's of the withdrawn chassis.That c.r.t. certainly looks odd, mounted as it is. Also, the chassis is unbalanced when removed from the cabinet and tends to want to fall onto the c.r.t.'s face!!
I'll need to proceed with caution when working on it.
Many thanks John (Heatercathodeshort) for the offer of the scan of the R&TV servicing pages. I'd like to take you up on this if I may? I'll send you a PM shortly.
Adrian.