Umm, I'm Chinese and quite fond of my brown hair;-)
Yes, I'm in the UK. Had thought of the hydrogen peroxide (thanks for the chemical formula)but just haven't got round to sourcing it. Trip to chemist, I think. It isn't off the shelf stuff, so will have to speak to pharmacist. Bet you they will only sell weak stuff over the counter (ie without prescription from doctor), so will have to make do. Not sure about the home gadgetry business - sounds like a major project when I don't have an essay to write.
Will let you know how it goes.
Is the Colloidal Silver they sell in health food shops any good?
Rgds
Esme90