The Treasury consultation alluded to certain UK-derived rules that are set out in UK statute, and it suggested that regulators might be constrained as a result. But we found that the regulators did not appear to feel constrained by the existence of any domestic rules being set out in statute. We therefore conclude that while periodic review of domestically-derived rules to see whether they would fit better in rule books rather than in statute may be necessary, they do not need to be included in the exercise that moves the EU on-shored rules out of statute and into the regulators’ rule books.