The family believe it should have explained that line speed is the speed drivers are expected to go at – and that they would be failing in their job if they did not go at line speed.
That failure to explain, they say, led to some people wrongly believing Brett was driving too fast, even though he was driving below the 75mph speed limit on that part of the track.
It is understood RAIB has agreed to consult the family before any future report is published to avoid a repeat.
Stephanie said: “I’m pleased the Evening Express is writing this piece to explain things for people who don’t know the railway.”