Let's clear something up straight away. When clients hear the words "grey blending," a look of panic tends to cross their face. They imagine walking out of the salon looking like their nan. They picture themselves surrendering — to age, to grey roots, to a life of sensible shoes and early bedtimes. That's not what grey blending is. Not even close. Grey blending is one of the most flattering, low-maintenance colour techniques available right now — and for blondes especially, i