Hi, OP -
I did a stint as an admissions tutor in a selecting university; my School has a very high offer. I think you, and hopefully DD, might feel better if you reframed this.
The GCSEs may be a tad low for Oxford, depending on the academic reputation of the school. If Oxford is the true dream, so what? They do not interview hopeless cases. Go for it.
Cambridge weights GCSE results less and there are many similarities. As I understand it, this includes the desirability of the degree for law conversion. It certainly includes the atmosphere, and the academic quality and modality. Has DD given any thought to Cambridge instead?
Above you say Edinburgh and Durham are too far away. Is that definitive or might DD change her mind? There is absolutely no point wasting a UCAS slot on a university you will not attend.
Is DD willing to go into Clearing or do a gap year? I ask because I don’t see what I consider to be a solid Insurance choice listed. About 80% of predicted grades are wrong, with the large majority being too high. Everyone not willing to make one of these choices needs an Insurance option they are happy with, allowing for drops in two grades.
PP are correct that Oxbridge care deeply about supercurriculars and not about extracurriculars, with the exception of hardship cases: applicants who need to work their way through high school, do caring, etc, and accomplishments at the highest level.
The most important thing is for DD to find a university where she will thrive. As PP said Oxbridge only works for some, as the tutorial system is extremely demanding. A 2.1 from UCL, York, Nottingham, etc together with strong referee letters and an excellent CV will be immensely more useful to DD than a 2.2 (or worse) from Oxbridge, no strong letters, a life of stress and a sparse CV reflecting this.
It is undeniable that where you come from can help, sometimes a lot, but I have a broad enough circle to know that ultimately what you do matters more. Please focus DD to choose the university that will bring on her best.