I think that I have found another, this time in Portugal with a British railway financial venture. The Larmanjat Monorail Lines of which there were two actually built in Portugal. 1 around Lisbon the other called the Torres Vedras Lines. These both only lasted around 2 years or so before closing amidst Financial and farcical operating scandals. What were these lines, no you could not make this one up. They were soewhat similar to the Indian one I mentioned in my thread on the Patiala Steam tramway, but there were 2 outside sets of wheel running on WOODEN yes WOODEN planks. The locomotives looked to be fairly convetional in design, rather than the Indian Patiala Steam tramway ones. The creator of this appears to have been French. More on this can be found in W.J.K Davies 'Narrow gauge rails of portugal PP 264. A great read if you love NG Railways. ISBN 1 871980 35 6.
JonD