New fences and outriders being tested at Aintree today

[Euler]

Changes to Grand National fences will be trialled at Aintree on Saturday as the racecourse tries to improve safety.

Ten horses have died in the big race over the last 12 years.

Four fences have been rebuilt using softer cores instead of the former rigid timber frame.

Two outriders will also be used on Saturday to help with loose horses during two races over the National fences - the Becher Chase and the Grand Sefton Chase.

http://www.bbc.co.uk/sport/0/horse-racing/20628427