@AchillesFirstStand @CrockettAndTubbs I think they publish details every quarter (here’s the latest newsletter).
As for the personal cost to that, it depends on your salary and how much you have invested. But, let’s say it takes you an hour each quarter to check your investments, find the new proportions, and make 14 trades - then even if you have 20k in your ISA, you’re only saving £20 a year, or an hours work for a fiver.