It is of course just possible that the PM took the action he did because he agreed with Murdoch, & had done so all along, rather than that this proves he is 'in thrall' to him. And the police were not obliged to listen to Cameron, but appear to have decided that the advice (which, at least arguably, was all it was) he gave was good and such as should be heeded.

I speak purely in general terms in saying that one should not inevitably impugn the motives of those with whom one does not see eye-to-eye on some, or even most, matters. Why not give Murdoch, Cameron & the Fuzz the benefit of the doubt as to their motivations?

~Michael~