Pernicious Regulation

I've long been puzzled by the frequency with which people seem to change energy supplier in the hope of reducing their bills, suspecting that many of the savings might be illusory.

I've just heard a discussion on BBC Radio 4 that confirms that suspicion, explaining that the 'projections' of savings usually exaggerate the likely savings of any change. Apparently that error is not the fault of the energy companies, but arises because the regulator 'Ofgem' compels companies to use  an unsound method of calculation that is almost certain to overestimate the savings. Ofgem introduced the relevant regulation in 2014, ignoring representations by people who pointed out the error.

see
https://www.theenergyshop.com/advice-guides-personal-projections-and-why-they-are-so-dangerous

I wonder what disciplinary action will be taken against the incompetents responsible. My guess is none.