Sorry, beergut! Those Cheerios are not the "real" US Cheerios - in the UK, I've only ever found them in this multigrain variety or the sweetened variety. Having a discerning and stubborn Cheerio adict myself, I can definitively state that "proper" US style Cheerios (only oatmeal flavor and unsweetened) cannot be found at UK grocery stores (just maybe, there is some special American store in London that stocks them). My advice is: bring your own!
Karen