The astounding turnout of youthful voters for Labour, while not enough in itself to win Jeremy Cornyn a new address at No. 10 Downing Street, was enough to deny the Tories the ability to form their own government.
These youthful voters are uniformly and vehemently against Brexit. For every university student that voted for Brexit in 2016, six voted to stay in the European Union. The results of the 2017 snap elections are seen in many quarters as these youthful voters seeking revenge on the Tories (and their Tory-backing parents and grandparents) for putting further limits on what was already shaping up to be a life far less prosperous and rosy than what their parents and grandparents had.
The big problem with Labour retaining these youthful voters: Corbyn himself never was a strong Remainer, and now openly backs Brexit and has for several months.
What happens when Corbyn's student supporters wooed with the promise of free college and the implication that he was going to oppose the Conservatives on Brexit, find out that Corbyn's idea of Brexit is much like what the Tories envision?
Just like the Tories, Corbyn wants to leave the customs union and the single market, and has already stated that he's willing to give up freedom of movement, one if the things Millenial voters most want to keep. What happens to his newly-discovered youth appeal when it becomes apparent that he isn’t going to fight very much for what most British youths want in Re: Brexit?
Unless Corbyn can find a way to thread this needle, or find something else to keep the students coming to vote, he and Labour may well see big losses in the next set of elections.