It is 2016, the over 60's voted resoundingly in Brexit.
The young voted for Bremain.
However.... in 1975 today's over 60s were young people, and they voted heavily for Bremain, to stay within the Common Market. Those youthful Bremain voters have had the benefit of 40+ years of experience and have therefore changed their minds. Same people, different opinion.
AIBU to think it that the criticisms of the old for voting for Brexit are ageist nonsense (e.g., I have seen things such as saying that the young have longer to live, so their opinion counts more than some old people whom we will shortly have to bury anyway), and that elderly votes are every bit as valid as young ones.