From c4 website::
Methodology
In order to compile our results for The Best and Worst Places to Live in the UK: 2006 we judged all 434 UK local authorities on exactly the same criteria - crime, education, employment, environment and lifestyle.
To determine how important each of the criteria is to people in the UK, ICM interviewed 837 people across the country aged between 18 and 65. They were asked which would be most important to them if they were to consider moving home, and to then rank the rest in order. They prioritised the criteria as follows:
1. Crime
2. Environment
3. Lifestyle
4. Education
5. Employment
here is the link to the 10 best and worst
http://www.channel4.com/4homes/ontv/best&worst /index.html