That all sounds good, open days are happening soon to she needs to get organised. BTW lots of kids now have a parent in tow at open days, so go along too if you can.
Your Dd needs to do a lot of research about all the departments and courses that she is interested in, ideally before she goes. That will help her make better use of the time there.
She wants to look at course structure, topics, options v compulsory modules, methods of teaching and assessment, industry / professional links and accreditation / main areas of research in the department / number of postgrads / are other students mostly local / rUK/ overseas , university facilities , pastoral care, halls of residence, student satisfaction for that department etc .
There will be a chance to talk to current student and teaching staff as well as admissions officers.
All this will tell her a lot more about what it’s like to study there than some outdated and simplistic notions of prestige.
There really is no one best university to go to, even if you have 6As at Higher and 4 As at AH . There’s just the best place for your DD as an individual to study the course that she wants to do.
She might prefer to do a course that’s ranked 3rd in the country instead of 1st , because it has more face face teaching, group work projects and mostly uses course work instead of being heavily weighted towards end of term exams.
Or one that’s 4th but teaches the specialist options that she is interested in and has close links with industry and a chance for placements or a term overseas.
If money is tight she might want to live in a cheaper city, rather than have to work every weekend to pay her rent. Or she might prefer to work and save all summer to afford to live somewhere expensive because she loves the city or the course.
There is no one perfect outcome. It won’t affect her career chances going to no 3 rather than no 1. But it WILL affect her if , for example , she hates the city because it’s too far away from home, is lonely because she is shy and never meets anyone because most of the course is online . Or if she is stressed out by closed book exams and they have them every few weeks or she has to do module she hates for the first two years because there is no choice .