The “youthquake” was a key component of Corbyn’s 10-point advance in Labour’s share of the vote — exceeding even Tony Blair’s nine-pont gain in his first 1997 landslide. No official data exists for the scale of this but an NME-led exit poll suggests turnout among under-35s rose by 12 points to 56% compared with 2015. The survey said nearly two-thirds of younger voters backed Labour, with Brexit their main concern.
— Alan Travis, The Guardian, Saturday, 10 June 2017