The graph of age groups comes from https://enemyinastate.wordpress.com/2017/04/26/shock-corbyn-would-win-if-only-under-40s-voted-new-mega-poll-says/
Young people actually have got the message. But old people are scared, even though they have the most to lose from cuts to the National Health service.
It remains to be seen if the Tory rejection of the ‘Triple Lock’ on pensions makes a difference.