One longshot point in the article is that they don’t put lead in petrol any more.
Another is that smartphone sales to yobs has gone up, and the yobs (Brit for yoot) are busy playing games on the phones.
The yobs are probably playing PC and console games, too.
Overall a very interesting article, thanks for posting.
There's some persuasive evidence that correlates the removal of lead from gasoline in the US with the sudden drop in crime rates from 1991 to today; it matches perfectly with the first teenagers who didn't grow up with leaded gas. And areas that still have high crime (inner cities) are the areas that still have a lot of lead exposure from paint and lead in the soil from high traffic in the roads around them.