Recent statistics revealed a big rise in number of sexually transmitted diseases among children.

Data showed 40 percent increase in detection rates for Chlamydia since 2003 when a national screening programme was introduced. 2,020 teenagers screened positive for the infection while below the age of consent in 2008 as compared to 1,176 cases the previous year.

Norman Lamb, the party's health spokesman, said: "The number of youngsters contacting STIs is very disturbing. Children must be informed about the risks involved in sexual relationships and taught how to be safe. "

Lisa Power, head of policy at the terrence Higgins Trust, the sexual health charity said: "We need to accept that having a legal age of consent will not stop some young people from having sex."