Tory analysis of official statistics show that in the poorest 10 parliamentary constituencies where 39 per cent of children live in households classified as deprived, only 69 per cent of families claim the money to invest in a CTF.
In the top 10 wealthiest constituencies where only 4 per cent of children are in deprived households the figure rises to 83 per cent.
The Tories announced last October that they will only continue CTFs for the poorest families and disabled children if they win the general election.
Shadow families spokesman David Willetts told the Guardian: “The aim of encouraging parents to save for their children’s future is a laudable one.
“But it is deeply worrying to learn that those who could benefit most from child trust funds are among the least likely to use them.”