It looks like the "average" household bill will get capped off at about £2k (as opposed to something like £5k), having been running consistently for many years at about £1k. The downside on this is that the current plan seems to be to hold bills at £2k average for a number of years beyond the point where they naturally would fall back towards the historical £1k mark
So we all may have to get used to energy being twice the price of historical norms for a good number of years. The good from this, of course, is that it will hopefully make us more energy conscious and energy efficient. The bad is the most vulnerable in society will continue to need support with basics like keeping warm