It includes both good news and bad; that is that the threat of disqualification does deter speeding for most drivers, but that their knowledge about the consequences of speeding and the use of speed cameras is poor, and furthermore, there is a small minority of drivers who persist in illegal behaviour, believing that speed limits should not apply to them.
The part that I found the most interesting was the section on Qualitative studies, beginning on page 37. The people included in this study were mostly those who already had points accumulated, and of those, a number were repeat offenders, and people previously disqualified. So, the population is not representative of British drivers, but is a significant population in road safety terms. The conclusions included the following recommendations (the last seems to be an observation, rather than recommendation)
•The disqualification system is seen as lacking in consistency, when 12 points
may or may not result in withdrawal of the licence, depending on the
persuasiveness of pleas of exceptional hardship in court. Sentencing guidelines
on this issue could usefully be reviewed.
• Consideration should be given to better publicity explaining why cameras are
needed at particular points, and linking them more clearly to the speed limits in
force.
• High mileage, older males should be seen as a major target group. The fact that
many speeding infringements are work-related activities suggests possible
avenues for intervention.
• The illegal passing on of points to others is widely held to be a common (and to
some, acceptable) practice. Further investigations of this issue should be carried
out.
• There is an identifiable hardcore of drivers who seem resistant to efforts to make
them reduce their speeds. Deterring these drivers is likely to be a long and
difficult task.
I don't recall any discussion about this, at the time of publication. DfT seem to have just stuck it on the internet with no fanfare and let it wither in obscurity.