Traditional academic subjects usually fair well when applying, subjects such as Maths, Physics, History, Chemistry etc etc. they do look for pure perfection, A*-A grades at gcse, straight A's at A level, and usually a 1st class degree, and even further down the line, Master's and PHD.......
Applicants to internships have these grades, and these who perform on the internship secure the jobs.
When looking on the floor, it is usually public school boys with Oxbridge backgrounds, if you can't get an initial interview in the next year, it may be time to further your education or go it alone.