Hi this is the official Crufts qualification rules and just a few of the classes which qualify you. There are also other ways ie studbook etc but you will find details onthe website.
http://www.crufts.org.uk/crufts-2012-qualificationIf it has won any of the following prizes in a breed class (as defined in Kennel Club Regulations for the Definitions of Classes at Championship Shows) at a Championship Show, including Crufts, where Challenge Certificates were offered for the breed between 7 January 2011 and 9 January 2012.
i. First, Second or Third in Minor Puppy Class
ii. First, Second or Third in Puppy Class
iii. First, Second or Third in Junior Class
iv. First, Second or Third in Yearling Class
v. First, Second or Third in Post Graduate Class
vi. First, Second or Third in Limit Class
vii. First, Second or Third in Open Class
viii. First, Second or Third in Veteran Class
(5) If it has won a first prize in any breed class at Crufts 2011. (NB This is in addition to those dogs which have qualified in classes listed under 2 a (4) above)