This isn't law, and probably never will be in this form. The UK has some pretty lurid (and rather excellent) comics - Viz for example, featuring Buster Gonad and his Unfeasibly large testicles, Tina's Tits - who thinks her breasts have magical powers, and Johnny FartPants - there's always a commotion in his underwear.
This is "underground mainstream" if you catch my drift, and no one would outlaw these.
Balance that against a screaming right wing press, and millions of people who are almost paranoid about paedophilia though, and you have a strong political pressure to be seen to be doing something. These people may be paranoid, but they have votes, and their fears are real, even if the causes are exaggerated.
They worry in this particular instance about "near photo realistic" artwork - such as that in computer games, and loopholes by which people who possessed indecent photographs could escape prosecution by passing it off as photo-realistic art.
Who is the victim - who knows ? But there is a very great public opposition to it - and politicians are reacting to it. - Believe me though they will react just as strongly to any attempt to outlaw comics - Old public schoolboys won't be easily seperated from their Beanos and Dandys