It's rape not seduction

This is correct. Given the state of the law in the UK, it would be inaccurate (bad journalism) to call it rape. Rape is a legal term, and it does not apply in this case.

Yes, the law is sexist, unjustifiable, and should be changed.

No, this does not excuse the tone of this article, which is written to make the woman out to be the victim and to minimize the harm done to the real victim.