This seems to be about the extent of the complaint. It doesn't say, but I wonder if she complained to police?
NW Leicestershire District Council wrote:
Judges at the court heard that before NWLDC received a complaint from the passenger’s daughter, Mahmood had over nine years committed a large number of low-level offences including being banned from driving and road rage.
That's not to say that there may be some kind of parallel criminal process going on, which hasn't been mentioned above. But the complaint must have been made nearly two years ago, so I suspect there's nothing else happening.
Strange use of the word 'grooming', too. I know the word has kind of entered popular parlance and its meaning is maybe a bit wider than it was a few years ago. But in official discourse it seems to normally apply to sexual stuff and a person significantly younger than the perp, as opposed to the 70-year-old victim here.