Re: If the law isn't enforced, it shouldn't exist
If there is a clear exception placed in guidelines, then that clear exception could be written into the law.
As it stands, guidelines or not, it is possible for a 15-year-old to be imprisoned for having pictures of their 15-year-old girlfriend, obtained with their consent. They have committed a crime. Just because the guidelines state they shouldn't be prosecuted for it doesn't mean that they never will.
Why can it not be written into the law that this is legal? OK, it wouldn't stop there being legal arguments about the nature of their relationship, whether consent was given etc. but at least it would be written into the law.
There are too many exceptions to rules which are only in guidelines. Guidelines can be changed at the drop of a hat, laws need to be changed by parliament. The same goes for all data collection powers, anti-terror powers etc. If they are for a specific purpose, that needs to be written into the law, not left as "We promise we will not abuse these powers".