at

http://www.cps.gov.uk/legal/h_to_k/indecent_photographs_of_children/

categorises the degree of seriousness of CP images from one to five:

Level one - Images of erotic posing, with no sexual activity,

Level two - non -penetrative sexual activities between children, or solo masturbation by a child;

Level three - non-penetrative sexual activity between adults and children;

Level four - penetrative sexual activity involving a child or children, or both children and adults;

Level five - sadism or involving the penetration of, or by, an animal.

So your defence would have to be that there is no 'erotic posing' - which is an incredibly subjective test. So I suspect you'd do well to find a bonfire...

• ( http link ) Prosecution guidelines for child pornography
[Anonymouse]