I'm biased because one of mine has recently graduated from Imperial and loved it! They would highly recommend it - the quality of teaching and placements, the opportunities in research, travel etc, the support from colleagues and staff. Things to think about:
The med school has it's own sports clubs and other societies (and a bar at Charing X hospital) that seems to make them a close knit and social group. It's important to have a healthy work life balance as a medic.
Being a med student or doctor in London or a big city means seeing different issues/diseases from being a med student somewhere like Keele or a doctor in the Highlands (actually, Imperial does offer an intercalated BSc in Remote Medicine), for example. There are pros and cons to studying in different locations, being in smaller hospitals versus large, your DD might want to consider where her interests lie and to be sure she has chosen the best med school for her. If nothing else, the subject quite often comes up as an interview question 😂
Imperial, UCL and Oxbridge are more focused than other med schools on producing doctors who are also academic scientists. Does the academic side of medicine and research interest your DD or is she more interested in practising medicine and wants to get to work ASAP?
Intercalation is compulsory at all 4 of those universities - taking an extra year to study for an academic degree in a specialist field and undertake a short research project. It's an amazing opportunity if that is what your DD wants. If she isn't that interested, it's another year of living expenses and 2 years of getting by on the NHS bursary instead of 1 (it's less than the student loan and means tested so she may only get the £1000 NHS grant plus the non-means tested reduced rate student loan for medical students of about £2.5k for years 5-6).
https://www.nhsbsa.nhs.uk/sites/default/files/2023-01/NHS%20Bursary%20Funding%20for%20Medical%20and%20Dental%20Students%202022-23%20%28V5%29%2012.2022.pdf
There used to be an advantage in taking an extra degree and/or publishing when it came to applying for foundation roles but the process has changed now.
There are a few opportunities at Imperial to take an intercalated PhD before continuing with clinical training, if she is as passionate about the research side of medicine as the practical side.
Imperial and London are expensive! The halls are expensive, as are the areas most students tend to live. They have very generous bursaries for students from households with an income lower than £60k. Students from the lowest income bracket will receive about £19k in loans and bursaries. I would budget for a similar amount. It's not much fun being a med student and working during termtime, there are no long summer vacations after the first 3 years so they can't get a summer job. If you can't help out, your DD might have a better quality of life outside of London.
Other things to know would be that the teaching style at Imperial is integrated leaning towards traditional with a bit of PBL... which probably means nothing to your DD yet 😂This might help her think about what type of course is best for her:
https://www.themedicportal.com/quizzes/would-i-be-better-suited-integrated-traditional-pbl-course-quiz/
Also, they teach anatomy by dissection.