I saw the footage of this on a fire marshall course last year, apparently the company that own the footage dont let anyone show it apart from for fire training purposes. It was used to show how people react when they see fire, some truely horrific images, the club actually used to routinely padlock the gates shut to stop people bunking in after the start and when they investigated the debris under the stand that caught fire they found programmes over 30 years old.
RIP