Mapleleaf
What you say is true, but a higher percentage of older people voted Leave than in any other age group.
The turnout of 72% was higher than that for recent general elections; a significant number of people who'd never bothered about 'democracy' before suddenly got the 'democracy' bug. It didn't last for long, though, turnout for the 2017 GE was only 68%
GE turnout statistics from 1950 here:
www.ukpolitical.info/Turnout45.htm
Another Tired Kicking For The Sick And Disabled By Rishi
To think that London, or anywhere else for that matter, does not belong to any one demographic