@Card1gan
AS levels would need to be declared on UCAS, so would be available to med schools.
There are very few places that still take them into consideration. Leeds is one of them and will actually take the best out of GCSE or AS level score for their academic component.
Otherwise, it would be down to whether your DD sits 4 AS levels or not. QUB will take the 4th AS in lieu of an A* (ie offer drops from AstarAA to AAA plus a at AS level). It would help towards an application at Manchester via their holistic route (most applicants are assessed with a cut off of top 1/3 UCAT for an interview but around 500 interviews are offered using an holistic assessment of all elements of an application). A 4th AS would also give UCAS points for Barts, but you have said London is a nope.
Sadly, this is once again a case of med schools catering to the many and not the few and Welsh and NI applicants tend to lose out as they are on the old letter grading system for GCSE (and as already discussed, there are fewer Astars than 8s and 9s) and do not get benefit for good AS levels.
Cardiff compensated for this last year by considering only a 9 was equal to an Astar, but they switched it to both 8s and 9s this year and the result was a bit of an issue with their admissions as even those with full scores were not getting interviews. They may go back this year or change things up completely. QUB are moving to only 9s being an equivalent to an Astar for 2021 entry so "good" GCSEs in letter terms would stand her in better stead here than numerical ones, as there will likely be fewer 9s than Astars!
Non London BMAT unis are Leeds, Lancaster, BSMS, and Oxbridge so a fairly limited number. As ever, Monkey gives very good advice to sit UCAT early enough to keep options open, as if things do not turn out as hoped on the day, the BMAT is still an option. Although with good GCSEs, there are still likely to be lots of options with a UCAT over about 610