Are children in the UK silently suffering from lead poisoning, or "losing IQ points"? I have lead paint in my house and If I took my children to get tested at the GP, I would expect a strange look in response.
Compare this to asbestos, where a survey is always recommended when purchasing an older property in the UK. While I think a lead survey would be suggested in the US if purchasing a pre-1978 property (and is required in some areas when renting to a family with children), I would guess only a handful are done here every year.