@flamingnoravera - That Sutton Trust document is very interesting. As a medicine admissions tutor I actually think the "good" example on p3 is poor, and would not offer that applicant an interview. For the medicine statement on p4 I agree with the teacher, not the admissions tutor, and am quite worried that a medicine admissions tutor thinks that is appropriate content for a personal statement for entry to an undergraduate programme.
There are a couple of issues highlighted here. The main one, which the report begins to address, is that having a big block of white space in which to write a personal statement is unhelpful: it is far better to have a defined structure so all applicants know what they are expected to write about. The other, as evident from my first paragraph, is that admissions tutors for the same subject at different institutions will have very different expectations. Consequently, writing one personal statement for four institutions can be more difficult than we will admit publicly. As most medical schools don't read personal statements any more it has become a bit less of an issue in that particular field, but it will still be significant for some other competitive courses.