It can be a touch daunting to sift through all 40 runners in the world's most famous race - Aintree's Grand National - but there are several hard-and-fast rules that can help whittle down the field to create a manageable shortlist.
It can be a touch daunting to sift through all 40 runners in the world's most famous race - Aintree's Grand National - but there are several hard-and-fast rules that can help whittle down the field to create a manageable shortlist.