A knife wielding rapist will spend at least seven years behind bars after judges increased his jail sentence.

Matthew Napper, 25, of Lammas Road, Ham, was given a minimum four-and-a-half year prison sentence in May but on Tuesday Attorney General Baroness Scotland won the right to increase the term.

Three judges at the Court of Appeal in London agreed the original sentence was “unduly lenient”.

Earlier this year, Napper was found guilty of nine counts of rape on two victims, one who was under 16 at the time, at Kingston Crown Court.

During his trial the court heard how he would enter his victims’ homes and then force them to have sex at knifepoint.

The attacks happened over a period of months in 2000 on the girl, when Napper was 16, and between 2003 and 2007 on a woman.