When i bleached my hair it was a light blonde colour with slight yellow and orange patches where i darker dyes had been before. I used this white toner once and it took all of the orange, copper and yellow tones out! But you will need a few tubs of this because it isn't that much!
You should only use this if you want to lighten or tone your bleached hair! But it is a great product however if you live near a Superdrug you could go there and purchase the exactly same product for £1!