I've just looked at this for my DCs school.
The % of pupils who attained Level 2 or above in the Key Stage 1 writing assessment is very low.
I know DD is included in these figures, and the school marked her particularly low to ensure she received intervention from IDS because of her dyslexia. (Apparently on a stellar day she could have been graded as a low level 3, rather than a high level 1).
I can't help thinking the school have put DD before their results. Which makes me thankful she's at a school which puts the children before published data, skeptical of results, and a little bit sad outsiders will think she's at a rubbish school.