"according to wikipedia (I know), UK metered supplies covered 33 of households and leads to a 5-15% reduction in usage."
Fair enough, though I've never known anyone to leave taps on for the hell of it.
Though I do know some people with meters don't flush the toilet...
" I know I am much more aware of water use on a metered supply than I was ona flat rate supply"
Aware, maybe, but I'm curious to how you use less. (or rather, what you used before than you don't now).
Not being a git, I'm genuinely clueless - other that watering the garden, maybe washing the car less, but as for the indoor use...?