Oh..... I left a line. It was an absolute nightmare getting it to fit, I spent weeks looking up words in a thesaurus that meant the same but had less characters! Then deleting lines and words that were not quite as important as others.
At our one point it was actually exactly 47 lines and 4000 characters but that was in Word, as soon as uploaded it to UCAS it was three lines too long and I had spend an afternoon cutting again.
I did did put a couple of paragraphs together when usually I would have separated them, but they were related so it was passable. On the whole I thought mine looked better with some spacing when I looked at the final thing in UCAS.
I sure the finished PSs will vary hugely when the universities receive them.