The lunchtime edition of Look North provided a short preview of the full report coming up in the evening edition, and promised footage that has never before been broadcast.
If you live outside the Yorkshire region, you can view the programme shortly after transmission via the BBC iPlayer, or live on Sky channel 956 from 6.30pm tonight.
PICTURED: a portion of the collapsed Emley Moor Mast (1969). SUPPLIED BY: Online/John Carter. COPYRIGHT: John Carter.