It may sound like a silly question so I apologise, but how do you identify the less competitive/desirable medical schools? She’s keen to apply for one aspirational option where it would be considered a long shot, one that’s somewhere in the middle and two that are less competitive. Should we consider league tables?
Personally, I wouldn't pay much attention to league tables. (My own medical school ranks pretty highly in league tables, so this isn't sour grapes.) There are a few criteria that contribute to league tables that you might want to look at, but even these won't have any value for new medical schools.
One thing worth looking at - but only at the extremes - is performance in the National Student Survey. In general this is not a useful measure of anything, but if a medical school is consistently right at the top or right at the bottom it suggests there's something you should explore. However, the reason why final-year medical students at King's College London, for example, consistently record very low levels of satisfaction might not be something that particularly bothers your daughter. Furthermore, the reason why final-year medical students at the University of Nottingham gave it appallingly low scores one year is almost certainly something to do with a one-off occurrence that hasn't affected any other cohorts of students.
There are data collected by the GMC on how well foundation doctors approaching the end of their first year of employment feel their medical school prepared them for the role of a junior doctor. I tried to set up a link for you to view this but I can't get it to work properly. If you follow this link and then click on "1. Questions by PMQ awarding..." you can play around with the filters. As a very brief summary, this puts Plymouth, Keele and Norwich (UEA) at the top and Imperial, Warwick and Manchester at the bottom. It's worth keeping this in mind alongside how your daughter feels she would enjoy studying at a particular medical school (and wider university). Remember that in most cases she'll only actually be spending two years at the university, with most of the rest of the time spent in various hospitals and GP surgeries that could be quite a long way from the university.
Of course, none of this helps her to make decisions regarding new medical schools that haven't produced any graduates yet.