There's a live consultation here on obscenity: www.cps.gov.uk/consultation/public-consultation-obscene-publications-prosecution-guidance
It looks like there is to be more of a focus on the intended audience, rather than the inherent obscenity of the article. I'd be really interested in the MN collective wisdom on this - I'm not sure it's going to change anything, and I'm not sure that the concept of obscenity is particularly useful given the number of alternative offences that can be used.