Information about both the consultations was, on the Defra website, in the dog magazines & most of the dog related websites, forums, & facebook pages.
The original consultation was started by the previous government, its results were published in 2010
http://www.defra.gov.uk/news/2010/11/25/dangerous-dogs/
http://webarchive.nationalarchives.gov.uk/20110202125928/http:/www.defra.gov.uk/corporate/consult/dangerous-dogs/101125-dangerous-dogs-responses.pdf
The second consultation in April 2012
http://www.defra.gov.uk/consult/2012...ous-dogs-1204/