A recent report showed that only 2% of children had bought National Lottery tickets with their own money in the week preceding the survey, which is down from 5% in 2005/6, the last time the survey was conducted.
The survey of 9,000 children aged between 12 and 15, conducted by Ipsos MORI and the Centre for the Study of Gambling to test Camelot's child protection measures, also revealed that the purchase of scratch cards by children was down from 6% to 4%.
The report attributes this drop to Camelot's campaign to ensure that the promotion of National Lottery games does not encourage underage play, and test purchases carried out by the operator.
ACS chief executive James Lowman said: "The prevention of underage purchase of lottery tickets is a success story. One of the key ingredients of this success is the valuable partnership forged between Camelot and operators that strikes the right balance between training, education and enforcement."