Can anyone point me in the right direction for info on 6 link suspension. Curiosity more than anything else.

Is it not simply a five link with a Watt's linkage instead of a Panhard rod?

Mallock woblink -- really just an improved transverse quasi Watt's linkage to give a lower roll centre.

Just goolgle for: mallock woblink

like this?

Good old Mr James Watt
http://en.wikipedia.org/wiki/Watt%27s_linkage