The law was introduced in 2014 and this was not possible then. I expect that is also why the Tories also didn't introduce any laws around what people are allowed to do in things that are yet to be invented like a "holodeck" either, but no doubt in 100 years someone will harp back to a 2014 bill claiming the Tories were responsible for that too.
Anyway, who was in charge of the Crown Prosecution Service in 2009 that decided not to prosecute the Jimmy Saville? Wasn't that the leader of the Labour party?