However, the main reason for the request was that the I was so pleased with the ordering introduced in 2.7.5 but, as it is more normal for me  to look down a list of names ordered by last-name/first-name than the other way about, I thought it worth asking if there was any way to do this sensibly.  I appreciate that it isn't simple and what suits me may well not suit others - so thanks for taking time to consider the possibilities.  I guess the only real solution is to define users differently, e.g. by structuring the name data into first name(s) and last name (not a global solution but would suit most of western europe and the USA at least!) but that is bound to have lots of impacts both on the application and on existing setups - so not really feasible, and probably not worth the disruption.