In the days of F1 on ITV - They had a precise alternative schedule with a programme start timing point every 10 minutes, during the allotted race window in the actual schedule. Thinking was, which ever reason took the programme off air - or the race had to be abandoned - there would be ample time for Jim or Steve to wrap up, get to a break, and pick up the back-up schedule at the next 10 minute junction.
They never had to use it though. Almost forgotten, but ITV never once lost the world feed during a race. and that included layering in a extra back up during one Japanese Grand Prix which was held under the thread of a typoon. The BBC lost it (albeit briefly) 3 times in the first couple of years once they had it back.
ITV managed to get through once whilst Studio 3's gallery desk went into a full scale meltdown. Switft patchwork sending the FOM world feed (minus ITV presentation sound) via LNN straight to network, took a break, and moved galleries during it.
Readers are warned that this post contains some flash photography
bilky asko, UKnews and VMPhil gave kudos