That is, before recently, the first 2,230 of earnings, above the personal allowance of 5,225, was taxed at 10p. Now everything above the personal allowance, up to 34,600 is to be taxed at 20p (it was 22p).
The government has made a mistake as it is seen as a tax on the poor. The government would say that there is the Tax Credit system in place, and housing benefits are higher. But that is not being listened to.