Hi, OP -
I am a former RG STEM admissions tutor in a School with a very high standard offer and a subject with a lot of Maths. DH is an emeritus Maths professor from a highly ranked RG School.
Lots of good advice above, particularly from @Piggywaspushed , @WombatChocolate and @ParmaVioletTea
Students need a good fit with their university in order to thrive. For most it is not comfortable being towards the bottom of the cohort, whatever combination of ability and background has caused this. Young women especially need confidence in an environment that still has remnants of sexism.
I always think applicants should go for one aspirational choice, two choices that align well with their subjects and predicted grades and two safe choices. They should use a safe choice for Insurance.
In Maths you need to read between the lines. The Complete University Guide 2026 is available online now. When FM is preferred where the School offers it, this is essentially a a requirement, except in a very bad year for Admissions. St Andrews is in 2nd spot and its entry requirement is A star (Maths) A star A so that is probably too aspirational. Edinburgh also wants A star at Maths and has become known for making tiered offers - first to those who exceed the requirements, then working down. But Maths slipped several places in the new CUG so it is possible they will rethink.
If DD likes Scotland, Glasgow is now a great option. The A level requirement is grade A in Maths, Glasgow Maths is now a UK Top10 and tops in Scotland in Maths research, the uni is in the lovely West End, and IMO the student vibe is great. Everyone I know there through DH is lovely. I don’t know if they offer Philosophy and Maths.
IMO Glasgow and Lancaster are currently two of the hidden gems of UK HE (I am associated with neither). Glasgow is RG and Lancaster, which is RG+, also Top 10 in Maths research, and hugely invested in Teaching and Learning in recent years, is also worth consideration. Again I don’t know about Philosophy and Maths.
I don’t know much about Exeter. I like Bath so I am sorry DD didn’t but obviously she needs to respect that.
I don’t mean to discourage DD from making an aspirational choice, be it Edinburgh or somewhere else. Not revising certain topics surely did hurt her mocks. But regardless of her ability, the requirement of A star in Maths tends to be a line in the sand when making offers (in my School and elsewhere).
I agree with @ParmaVioletTea that doing FM if this can be managed will create options in England Note however that Scottish unis want 3 ALs in one sitting within a year or two of application so DD cannot do 2/2 if applying to Scotland.
There are several other very solid RG+ programmes only requiring grade A in Maths. The teaching in these programmes will be geared to students who have that result. That can be good for everyone. Also, every RG School in the land has plenty of students who exceeded entry requirements and thrive.
Maths is hard! A level students can barely imagine. Much better to be in the top 25% at Glasgow or Lancaster or Notts or Loughborough etc and thriving than worry about getting into a uni with a glam name and find yourself struggling.
However there may be a middle ground for your DD. Best wishes to her.
St A’s Maths will surely not go into Clearing and I doubt Edinburgh will although with less certainty.