From the BBC ............"They had claimed Harris had indecent images of children, as part of a larger collection of adult pornography, but decided it was not in the public interest to prosecute him."...
http://www.bbc.co.uk/news/uk-28163593
It seems he was lucky not to get a longer sentence but at his age this could be the equivalent of a life sentence even if he is out earlier.
I was one of those who could not believe the accusations when he was charged, he must have a Jekyll and Hyde character.