I think you need to tread a little carefully.
Either the system will not deal with this scenario (which would be a defeat of the ends of justice) or someone will look at it and pursue the trustees.
If you ignore this court action, there is a danger (in fact a near certainty) that the trust will simply be found guilty in its absence. Unless the Magistrates’ Legal advisor is on the ball, it is unlikely that anybody will raise the issue of the trust and its lack of “legal personality”. It will probably only surface when the enforcement of any financial penalty is attempted and that may possibly culminate in bailiffs visiting the address of the trust (presumably as shown on the vehicle’s V5C).
Whether anybody will look at it beyond that is uncertain. But they should because the implications for this are quite profound. It would mean, in effect, that people keeping vehicles where a trust is the registered keeper are immune from all the legislation that goes with that (e.g. road tax, change of details etc). It also means that they can ignore any s172 requests with impunity. The result of that is that the drivers of these vehicles need not worry about committing any offences – which are not always as trivial as speeding - that rely on s172 to identify the driver.
In a Freedom of Information request in 2019, the DVLA confirmed that is was possible to register a vehicle in the name of a trust:
https://www.whatdotheyknow.com/request/can_a_trust_be_a_registered_keep?utm_campaign=alaveteli-experiments-87&utm_content=sidebar_similar_requests&utm_medium=link&utm_source=whatdotheyknow“We appreciate that you have taken the time to contact us in relation to this matter. I can confirm you are able to register a Trust as a registered keeper.”It would be interesting if you kept us informed of what happens. I’m already in the early stages of setting up a trust, and plan to transfer to it the vehicles currently registered to Mrs NJ and me!