We were looking at the Volvo carseat (up to age 5/6) I though it also turned into the booster to age 12 but it appears not! So, all the seats that are rear-facing are £200+........are there any that do til age 12....I mean that turn round and convert to a booster. Once child is 5 or 6 and out of the rear-facing position, how much is it for a decent booster? Are we talking of another £100 or so? Any advice?