I saw the which report last year, was shocking actually. Had to go out and replace my graco junior (rated poor) with a Britax Kid which cost twice as much, and ds2 is now in a britax evolva (£100 ) after being evicted from his mothercare one, also rated poor. Obviously, can't ever put a price on their safety, but I only saw the article cos I was researching vacuum cleaners!
Is scary how many of us don't see this info. They should rethink the safety regs IMO.