Well, Ofcom have cleared the storyline, noted that the storyline "actually had a positive impact" on the audience (leading to a lot of potential victims phoning the BBC action line) and concluded that the the story reached "an appropriate conclusion" when Tony (the paedophile) was arrested.
http://www.digitalspy.co.uk/broadcas...hile-plot.html
In all, I think the storyline was very well handled by all concerned, and I'll be staggered if there aren't awards heading for the show and cast.