@Nomoreusernames1244 in my experience it’s a combination of several things, and can be different for different sports. Most will have a pathway - in the old days it was classified as Start, Potential, and Performance. Athletes can be spotted early and put on the pathway (and this can be very early depending on what age an athlete matures for a particular sport - swimmers can mature as early as late teens or early twenties for example). Or, they can be spotted at regional events, club scouts, or late starters in the university system. For gaps in the programme they can run Talent ID things, like the Tall Sports initiative UK Sport did before London 2012, to try and identify girls for rowing, handball, volleyball etc. Entry to the programmes is done by a combo of results, sport science, and also future ambition - some sports run centralised programmes where the athletes are live and train around a central hub. These don’t usually allow an athlete to go to uni - “there’s time for that afterwards” is the usual approach, although there are sometimes exceptions for very intelligent athletes. So if you want to go to uni, you probably won’t get on some programmes. It’s not an exact science, and there are always fails, or people who don’t perform to their full potential for other reasons - family issues, lack of confidence or unable to perform under extreme pressure, so part may be a gut feeling by the selectors, but on the whole these people have seen an awful lot of athletes during long careers at the top, and to them a world class athlete will stand out a mile. But yes, it’s all about who will medal, because that brings in the funding. With cycling, it’s a reason why BC have concentrated on track - there are just more events, so the more events you’re successful in, the more money the sport will be awarded.