From the Daily Mail
Following a feature about the Grand National on April 16, the British Horseracing Authority has asked us to clarify that the drop on the landing side of Becher’s Brook is now no more than 5’10”, rather than 6’9” as stated, and that According To Pete was put down after breaking his shoulder rather than his neck.
[There are many stories on this subject. It’s hard to be sure which of them this correction refers to. None of them mention According to Pete breaking his neck and none of them have the incorrect height for Becher’s Brook – so I think the story has been silently corrected.]