Could someone please confirm on an Australian tandem master that the bottom port goes to the front brakes and the top port to the rears.

Many thanks

According to the Mini King catalogue 2008 pg 168 - that's correct.
( though I think the diagram is mis labelled parts 46/47 but photo correct)

I have looked at a few engine bay photos of 77 and 78 clubbys and the bottom port goes to the left side of the proportioning valve then to the front brakes.
It appears that the later version has a stepped bore and is connected the opposite. http://www.minimania.com/Fitment_of_Tan ... r___GMC227

This is my understanding of the dual system master cylinder
so do your own research , as I could be wrong
The original dual master cylinder fitted to clubman and moke had 2x 10mm fittings
the bottom pipe goes to the front brakes and the top pipe to the rear
the replacement later master cylinder GMC227 has a stepped bore , the lower bigger than the top
the lower has a 12mm fitting . the top is 10mm
on this master cylinder , the lower outlet goes to the rear brakes and the top to the front brakes
hope this helps
Mark

Thanks to all for your quick and comprehensive replies.