Hi Emma
Yes, there are several ways to look at speed profiles across the day.
What you need to look for are the V85 figures however (which is a form of averaging - otherwise we have to give you a breakdown of all speeds for every hour).
You have a summary version on your main public report
However, if you want a much more detailed look at a particular day, you can go to your new detailed report (go to Reports on your dashboard, and “dig deeper”) and you will see the V85 for each 15 minutes
In this example, I believe the road should be a 20mph limit, and the fact that the V85 is consistently over 20mph indicates that a substantial portion (if V85>20, then >15% is exceeding this speed) of traffic will be speeding. This is the kind of evidence needed to pressure for further speed limiting interventions.