See, the issue for me is a lot of people on this thread are seeing it as a black and white issue when it isn't at all. If you've had any law training you'll realise that the mitigating factors in this case meant it would be very unfair to hand down a custodial sentence.
The age of consent argument is an interesting one and I think the law needs looking at in that regard. There are varying ages for things and I think that's what's confusing for people. E.g. you can get married at 16 but if you sent a sexual image to your husband, he could be prosecuted on CSA charges.
I think either raising the age of consent to 18 (so it's the same for drinking, driving etc - all the 'adult' things) or lowering everything to 16 (not a good idea, in my opinion) is the only way forward.
I also think we need Romeo and Juliet laws like they have in the US. I don't see why two people in a loving relationship should be prosecuted because one partner is 16years and 1 day and the other is 15yrs and 364 days old. There needs to be some sort of lee-way. I know in the US they have these laws and they aren't abused because there needs to be evidence that it's actually a relationship, not just a casual thing. It's stopped a lot of people being prosecuted by parents who are angry about their son/daughter's choice of partner.
As a teacher myself I deal with stuff like this on a daily basis. I hope the victim gets the support she needs because to me, it's obvious that there is a failing in her support network somewhere, or else she would not be out at 4am in a city centre drunk.