Monkey2001 You are absolutely right about 4 or 0 offers. The Director of Admissions at Sheffield said exactly the same thing to parents who were waiting for their children at interviews this year. Universities are chasing after the same candidates who then get 4 offers and hence, May offers become increasingly common as these candidates have to make a final decision for UCAS. Universities start to have a clearer picture of the actual number of bums on seats then.
ThreeIsACrowd Definitely not too early to start volunteering after GCSEs. That gives a year's commitment to write about in her personal statement. Remind her to keep a journal of thoughts/reflection of her experiences as she may forget by application time.
If you have a browse through universities' websites, some suggest the sort of work experience/volunteering they would like to see. Job shadowing doesn't hold as much cachet as actual hands-on work. There is something to be said for getting your hands dirty and still passionately wanting to do the job.