I can only speak from my own experience but my child had an unsuccessful 4+ but a successful 7+ for one of the local schools. The assessment criteria changes at each age band so no reason why a child can't pass at a later stage.
Hello If anyone sees a light purple and pink patterned scarf, please let me know. It was spotted at the Peckham Rye exit near The ClockHouse today but I haven't had chance to get back to check. Please PM me if you spot it. Thank you