On their X/Twitter feed IE they have posted a message that “3m workers risk losing out by paying extra into pensions with no added employer contributions & high fees. Over time, this could cost £100k+!”. https://x.com/InvestEngine/status/1907032797375557959
The irony is that IE will not let their SIPP customers do anything about it. You cannot transfer-in your SIPP to IE (except from Vanguard) nor can an employer contribute to an IE SIPP.
It is meant to be their top priority but that has been the case for over a year.