Utterly unscientific, but who ever you are, please spend a few minutes filling out this form about broadband speed.
You can choose which broadband speed test site you use, and if you have time perhaps repeat the test with a different site (with enough data we can spot if certain test sites report higher/lower speeds compared to others).
You can see the results of the test here: http://snipr.com/ud0h0
No specific reason for doing this, but interesting to see variations in speed based on location/provider/timing, etc.
Anyway, before you forget, pop along to this brief form and add your speed results. It’s anonymous, and you can be as vague as you want about your location.