This doesn't have anything to do with uni, but I can remember you saying you get the train from Croy.
Every morning about 20 people pile off the train at Croy about say 10 past 8, wearing bright red polo shirts. They come back on the train about 10 past 5 and get off at Central like I do.
What are they? Is there a school in Croy that wears red polo shirts, or are they young offenders? They look rough, so I'll go for the second.