1. He was offered 3 points for each offence (and a safety awareness course was taken to negate the 4th speeding offence).
I take it that he declined (or ignored) the fixed penalty offers because he wanted to have a court hearing to defend or mitigate the charges.
2. Both : he did not notice the speed changes and the notices kept moving. (He noticed the movement after he was made aware of the offences as he kept an intentional look out).
So it was not so much that the limits were not conveyed adequately then? It's more the fact that they were not where he had previously seen them and where he expected them to remain.
Not a very strong defence, I would suggest. In fact, no defence at all - drivers are expected to keep a lookout for such things.
He was only made aware of the offences once the redirected notices were received.
Just for information, he should bear in mind that these notices are not “redirected”. The Registered Keeper will receive the first notice and will be asked to provide the driver’s details. The RK may be the hire company, or it may be a lease or finance company who provides the van to the hire company, so there may be two links in the chain before your friend. Each of them has 28 days to respond and when they do, a new notice is sent to the person or organisation they nominate.
Based on what you say, I suggest your friend is going to have to suck this up. Pleading not guilty to these offences will not succeed. His defence basically is “The signs were not where I saw them previously, so I missed them.”
Unfortunately, the exercise is going to cost him a lot more than £100 each (which would have been the cost of each fixed penalty that was offered). He will be fined half a week’s net income for each offence (reduced by a third if he pleads guilty) plus a surcharge of 40% of that fine. He will also pay a contribution to prosecution cost of around £95, though I imagine the prosecutor will ask for just one lot of costs. Three penalty points will be imposed for each offence.
If he pleads not guilty but is convicted, he will obviously lose the discount off he fine and surcharge and the costs will be considerably higher - around £650 and the prosecutor may not be so easily persuaded to ask for only one lot.
He will have three options on his SJPNs:
1. Plead guilty and not appear in court.
2. Plead guilty and have a court appearance.
3. Plead not guilty.
If he chooses (1) he will be sentenced and informed of he outcome by post. If he chooses (2) or (3) he will be sent a date to appear in court.
The only thing I can think that may be worth exploring is persuading the prosecutor to combine one or more of the offences either because they occurred “at the same time” or that they were one continuous offence. But I get the impression from your description that they occurred on separate days (or why else would the location of the limits have moved?). So I suspect that is a non-starter.