Thank you all for your comments. She has a fair amount of work experience including dairy, lambing and equine, also exotics in a zoo. She couldn't get a farm vet (it was cancelled) but spent a week with an equine vet. Not including her current job she has around 20 weeks which is more than many successful candidates.
Her reference from school was glowing about her academic aptitude. The only thing I can think of was that her personal achievements or responsibilities were not highlighted enough.
i think her strategy might be to quit the vet job and get more experience with farm stock and perhaps target Liverpool although she disliked it. Also the BMAT and target the RVC which she also disliked.
She was a bit thrown by the MMI interview she had. Other candidates were told they could stop talking after a couple of minutes for most stations as they had covered everything but she only had that once! She did a practice one at her old school but that could be another avenue to improve! A lot of the other candidates were reapplicants, ironically enough.