I just got back from a few days at the Harrogate International Nursery Fair, and definitely the most exciting news was this!
The new BeSafe iZi Stretch, rear facing to a whopping 36kg!! The height limit is 125cm, so it's unlikely that the 36kg limit will ever be reached, but it is great news for parents of high percentile children, who can sometimes reach 25kg when they're only three or four.
The iZi Stretch is belt fitted and tethered just like ERF seats up to 25kg, and can be reclined when it's installed. It's suitable from 61-125cm which is roughly six months to seven years). It's obviously approved under the new R129 regulation and will be available in spring 2022.