Some sound "general" advice there, however it was not written by anyone with a sound knowledge of the topic...
The Caution is not correct, and the advice "The worst thing that can happen is that you will be convicted of you original offence. You can get a heftier fine and more points in court, but unless you were doing silly speeds, its unlikely." really isn't too smart.
But each to their own.
If it says it on t'internet, it *may* not be true......!