There was an article in the Saturday Telegraph by Julia Hailes which you may find interesting: here.
I am a little dubious about this statement:
'The book concludes that the environmental benefits of reusable nappies are far from clear. Washing them in gallons and gallons of hot water adds significantly to climate change - "the number one issue facing the planet" - while disposables merely add to landfill.'
She seems to have ignored the carbon emissions created in the manufacture of disposables.