Good grief - is the statutory rape argument still going? I don't think I, SardineQueen, Ayerobot, Xstitch and the others who have made this point can actually repeat ourselves many more times without entirely losing the plot but, and for the absolutely last time from me....
Consensual sex with an under 16 is not rape - it is sexual activity with a child, or, if committed before 2004, unlawful sexual intercourse.
Non-consensual sex with an under 16 is rape and is prosecuted under the normal rape legislation
Consensual sex with an under 13 is rape as a child of that age cannot legally give consent.
What I think is an interesting point to consider is the purpose behind Ken Clarke's comments. Presumably he was trying to defend the justice system under his government and refute the suggestion that rapists are treated leniently by sentencing judges. This was surely the purpose behind his comments on sentencing statistics being skewed by the inclusion of "sex with a minor" sentences.
Now either the statistics he is citing do NOT include "sex with a minor" because it isn't rape, or he is citing some very bizarre and pointless statistics that include those offences for some random reason. Either way, he is trying to say "my government takes this seriously - look what sentences rapists get". He is either deliberately misleading people in order to make the statistics look better, or he is so poorly-briefed that he genuinely thinks that rapists get treated more harshly than they do. Either way, this does not say to me "I take this issue seriously and am thinking about what I can do about it".