.. venturing a guess here for the UK situation, I would be surprised if the ATPL would rate much within the academic sphere.
Although the level of student application required to get through the ATPL is certainly on a par with, and in many cases of a higher level than an undergrad workload, it would be necessary to sound out the particular institution you might have in mind ... certainly you might get a hearing in respect of mature age entry.
It always amused me that, for the ATPL, the pass was a fence .. enough marks and you clambered over ... a mark or two short and you fell back on the start side and had to have another go ... yet, as an electronics lecturer put it to us many decades ago when we complained that a particular exam was over the top ... the university applies the well known "zero shifting theorem" and assesses on the basis of a reasonable statistical comparison between this year's crop of students and past historical results.
Wish you all the luck in the world, though ... go for it ....