Way before that (maybe the 60s?) there was a prominent British politician who warned about unrestricted immigration into Britain from her former/current colonies.
He was exciorated in the press and basically run out of politics. Now it appears that there are enclaves in London where the government has virtually ceded authority to the radical muslim street.
Paris has the same problem.
Now, everything he warned about has come to pass. And the brits are impotent to control their own country any more.