Look Ligamentia is obviously either incredibly stupid, a troll or realises he/she is wrong and unwilling to back down and loose face.
Again to clarify here's the entry requirements for GEM course:
This course is designed for graduates of any discipline, and for others who have relevant experience which includes a substantial amount of contact with patients gained as an established health care professional within the NHS or equivalent body (eg RGN, RMN, Physiotherapist) with a qualification recognised by a statutory body. Only candidates classed as `home` students for fees purposes will be eligible to apply for this course.
Applicants must have achieved, or expect to achieve, at least an upper second class Honours degree, or integrated Masters degree, or be a practising health care professional with a post-registration qualification. All applicants will be expected to provide evidence of sustained academic endeavour within the last three years eg A level study, Open University, GAMSAT.
If they don't mention it as a direct selection requirement (Eg: you need x amount of A levels at grade y) then it's illegal for them to use it as selection criteria, as it's false advertising.
Again, with other trolls in the forum to burden of proof is on you to prove your theory. Send the admissions officer an email and past their reply here. If not STFU.