People have woke/Left attitudes but don't like the city that creates, so move to a well-off, mainly white, area...hypocrisy isn't a strong enough word.
ETA: there's also the Uni issue - 50% of people go to University and they are now adults, some with the attitudes they picked up in Uni, which are not conservative (small C).
Also, do we take it that the Liberals have weathered the storm re. being part of the Coalition Govt?
This is prime commuter belt territory, so probably not 'white flight' territory as a decent number would be on Chiltern trains in/out of Marylebone were it not for the pandemic.