With his infamous "As I remember London" article [1] he directly correlated skin colour to nationality leading to the claim that native Brits had dropped from 60% to a third.
replyIf you check now using current sources the British-born population is still around 59% the only thing that has changed is that fewer people identify themselves on the census as 'White British' which has a host of reasons around it. So he took a misleading statistic, interpreted it incorrectly and then built some kind of nostalgic story around it to support what was essentially an excuse to support far-right thugs protesting.