@Hollibobcat
The coyness starts with the poorer medical schools not wanting to be identified, however, the evidence is consistent. For reasons that are not at all clear, some mummies like to pretend that it does not exist, but it doesn't take very long to find examples.
"There is significant variation in preparedness for practice, progression through Annual Reviews of Competency Progression in UK training programmes and fitness to practice sanctions according to the medical school of primary qualification. There are also significant differences in the performance of graduates from different medical schools on high-stakes postgraduate examinations such as the Fellowship of the Royal College of Anaesthetists (FRCA), Membership of the Royal College of Obstetricians and Gynaecologists (MRCOG), Membership of the Royal College of Paediatrics and Child Health, Membership of the Royal College of General Practitioners (MRCGP) and Membership of the Royal College of Physician (MRCP)." Ellis 2022,
https://pubmed.ncbi.nlm.nih.gov/34987044/ Ellis is unusual in identifying individual medical schools - but there were only 31 medical schools then and there are 46 now. However, applying medical school characteristics that are associated with negative outcomes, it should be possible to estimate where the newer medical schools fit in the scheme of things.
"Medical schools differ in large numbers of ways that are causally interconnected. Differences between schools in postgraduate examination performance, training problems and GMC sanctions have important implications for the quality of patient care and patient safety." McManus 2020,
Exploring UK medical school differences: the MedDifs study of selection, teaching, student and F1 perceptions, postgraduate outcomes and fitness to practise | BMC Medicine | Full Text McManus is a useful read, covering differing standards and outcomes across a number of metrics.