I also agree with him about the "guilty plea" manouver being totally ill-conceived and corrupt. I think they should do away with the whole idea of someone getting off with a much lighter sentence because of an "early guilty plea".
If someone clearly lied to police and that is proven, then yes they should add that criminal act of perverting the course of justice on as part of their sentence. Lying to the police, making false statements... that's all criminal.
But this whole thing about "if you say you do it early on, then you'll get only a suspended sentence" malarky is messed up. That means that you mightn't have done the act at all but appeased them by pleading guilty because it looked like you did it. All of their records will then be wrong.
I would like to echo the advice of Mr. Fussy that whatever about pleading guilty if you did do it, you should never plead guilty if you didn't. It's an unnatural thing to do, worse than pleading innocent if you're guilty, corrupt to the core.