Thanks for the links. Neither suppliers have one slim enough so I guess it's back to the drawing board. Looks like trying to import one from Oz is the only option.
thanks again
I'm looking to install a concealed cistern for a floor standing toilet but only have a limited sapce i.e the wall cavity is 10cm deep. The only one I've found is a Geberit UP170 which is 9cm deep but they only seem to be available in Australia! does anyone know of another make or means...