Just to say, my sons writing piece was used during the HT appeal. We actually got a copy of this piece as we went to view papers at Maidstone and its the only part you are allowed to copy.
He wrote nearly a side of A4 - but his punctuation/spelling was NOT great.
I would say the content, use of adjectives etc was a display of potential and this helped get him through.
One tip! We had a few 'big' special words thats he could spell that could fit in most types of writing. He actually managed to get most of them in (in context!
which i think may have helped!! (Astounding, yearn, gusty, disastrous) How sad i can remember some