The judge thought it unlikely that he would have been able to carry out his evil plan because of his compromised health - due to his gross obesity.
That came under the 'mitigating' circumstances that he enumerated in his summing up.
But quite clearly Plumb was attempting to recruit 'crew' to help him, and if he'd managed to find a suitable accomplice, he might well have tried to carry out his fantasy. Bearing n mind he was also planning to abduct Holly's husband and threaten her children, goodness only knows how it all might have ended.
The man is clearly not very intelligent - in one of his messages he says that he would get Holly to sign some kind of declaration to say that she went willingly with him (to wherever he intended to take her) and that she agreed to everything that would be done to her - if he believes that sort of message / declaration would actually be taken seriously, and believed, he must be very very stupid, apart from anything else.
I think the judge was sentencing according to guidelines - as they do - but I cannot believe this monster will ever be safe around women. But we won't be the ones to decide, it will be the parole board, and I have no idea what criteria they will use to make such a decision, plus, stupid or not, Plumb tried hard when he was arrested to convince the arresting officers that, "well, huh, everyone fantasises about Holly Willoughby don't they" with a mock grin.
Women just are not safe are they? Not on the streets, in clubs, pubs, on public transport, not even in the security of their own homes. These evil bastards make all women prospective victims.
I think that once a man has shown such 'tendencies' - and this one did have previous convictions in spite of the fact his acts were clumsy and probably destined to fail - they should be watched for the rest of their lives. Whatever it is that prompts such fantasies, and acts of violence, doesn't I'm sure magically disappear during their time in prison. All they do is learn how to 'behave' themselves well enough to convince a board of 'experts' that they are 'going straight'.
I find it horrifying.