Speeding on black box insurance policies

[McFist]

Somebody I know has a telematics insurance policy on their car and has done for some time. They are a safe but enthusiastic driver, driving significantly (6 points+ territory) in excess of the speed limit where conditions allow, generally sticking to the limit in 30 zones, built up areas etc. They have never received any communication from their insurer about this and the box does not affect their manner of driving.

It got me thinking, and my guess is that the insurer would only take action on this were a claim to arise, otherwise they would have little interest in looking into the matter unless the driving data showed obvious dangerous driving.

I'd be interested to know if there have been cases in the past with black box insurance where the insurer has taken some form of action on serial speeders. I also wonder if there is a consensus on whether telematics data could/has been used to secure a speed-related conviction against a driver and the validity (if any) of insurer telematics data in speed-related offences.