I would hope no-one reads RAIB reports for 'gory' details, but for the technical analysis of what went wrong, and how to reduce the chances of a reoccurrence.
I wouldn't be surprised if this causes some discussion on the 'Another Train Coming' arrangements if, as suggested on here (and backed up by information in the industry) the incident is a case of the car driver going round the barrier after the first train had passed, presumably in the belief that the crossing had failed.
As mentioned up thread, this warning used to be given by an 'active' sign, which illuminated only when a second train struck in with the crossing already activated.
High installation and maintenance costs of the neon tube type signs resulted in their replacement with a passive sign ("Another train coming if lights continue to show").
I suggest there is a possibility that such a sign, when seen every time the crossing is used, regardless of how many trains are approaching, and therefore how long the crossing remains closed, could tend to lose its it impact over time. There will now be cheaper alternatives to neon tubes of course, so I wonder whether we will see a recommendation to reintroduce an active sign.