...for young people to use these to delay their period so they can eg "swim while on holiday"? I'm pretty shocked to be assured this is now normal - (and of course taxpayer funded, as they are in education).
This is not a contraceptive. According to NHS choices, it is a pill available on the NHS to treat menstrual disorders, also used when treating some breast cancers.
Perhaps unsurprisingly its listed uses do not include "delaying your period to have a nicer holiday".