Mars UK commits to reformulation

The Brits are much more worried about artificial colors and flavors than we seem to be, these days as a result of the Southampton study, which linked such additives to cognitive and behavioral deficits in children eating a lot of candy.  Mars has now made a commitment to eventually get rid of artificial colors in its candy bars.  Will they do the same thing here?  If so, what will we do without blue M&M’s?