With many thanks to the authors, here is an extremely helpful briefing regarding the Children, Schools and Families Bill 2009, which was intended:
"to help inform and assist MPs, Peers and their assistants to understand fully the impact upon Elective Home Educators and their children of the Children, Schools and Families Bill 2009 should it enter into statute in its current form."
"It is compiled and presented by a number of people with independent skills and expertise. They also have between them over 50 years of personal home educating experience."
Tania Berlow's work, also summarised here, can be found from page 49. A even simpler summary of the figures is here.