Opponents portray the regulation as government nagging that scapegoats sugary drinks for a multifaceted fat problem, and they say the restriction is unfairly narrow.
Indeed, the more Britain's task-force examined evidence from around the world, the more multifaceted the problem and the less obvious the benefit of presumed consent appeared to be.
"We continue to believe the monoline problem will ultimately require a broader multifaceted regulatory response, " said CreditSights analyst Rob Haines in a note earlier this week.