As you quite rightly pointed out, the code in the U.K. started off as voluntary around 2009. It failed to achieve any positive traction. In the end, the government decided that it would legislate. It wrote a couple of pages into the statute books—very light text. It also made the important move to give the adjudicator teeth, with the ability to levy fines. It's very rarely used, but those two things together, I think, were what catalyzed that positive change.
