What would you like to know about this please?
On what basis?
He doesn't deny speeding I presume?
He passed two different points of enforcement. That is two separate offences.
He could try to argue that it was one continuous act of speeding at court. He would lose but then he could appeal the decision. There is no case law on that particular point largely because nobody has raised appeal upon it.
That said, in practical terms, it would be pointless as it would cost far more to get clarification on the point that he would save even if they only prosecuted him for one offence.
Sorry if that is bad news.
Can I clarify anything for you?
Well, there is a debatable point.
There isn't case law on it.
I strongly suspect the higher courts would reject it if it were before them but until somebody bears the risk of costs we will not know for certain.
You can always ask them not to prosecute both on a public interest basis but it is not likely that they would agree.