Glad to hear they decided to take it easy on you, they are forced to give credit for a guilty plea because it supposedly fast-tracks it through the courts, that means that they save the time and effort needed to actually find you guilty and they show this with a reduction in sentence.
It's important to remember that to a lot of judges appearances are everything, if you turn up looking like a dealer they will take an instant dislike to you , but if you make a little effort and turn up "well presented" in a suit and tie and make the right noises you will make life a whole lot easier for yourself.

I find the situation in the UK insane, they lock up people for some real petty shit and then a few days later they're letting off some toerag mugger or burglar with a slap on the wrist and a paltry fine. :wtf: