I did a Google search for Geoff Leach + Heavylift and found this article;
http://www.austlii.org/au/cases/cth/AATA/2007/1005.html I wonder whether Mark G Leach and Geoff Leach are the same person as the Geoffrey Leach that is mentioned in this article? Or perhaps they are all different people who, by co-incidence, share the same surname?