Central line diagram of signalling in the colour-light era

Bit of a long shot, but I'm wondering if anybody has access to signalling diagrams they can share for the Central line when it was operated under colour light signalling, ideally shortly before the upgrade project (say around 1992).

Obviously there's Harsig's excellent page on the Central line, containing a couple of great pdf's, which have given me hours of fun. These, though, represent a period before substantial rationalisation and I was wondering if anyone had anything more recent? I'd also be interested in the signalling in the central section.

Thanks awfully