The RAC are currently conducting a “Risky Roads Survey”. Whilst it does not specifically related to bicycles (perhaps they forgot…?), you might want to contribute your observations from the cyclist’s perspective. Knowing that the most frequent severe bicycle accidents involve a car driving in the same direction, EVERY road is dangerous for us. Take the survey here. Of course you can always bring your own bike lane with you (works only at night)
You can also find the results of their 2008 survey on their website.