I'm trying to find footage from an episode of The Great Egg Race that aired on the BBC from 1978 to 1986. Specifically, from 29/04/80 with Tate & Lyle as one of the teams as there's every possibility that my dad was in it. I've tried Google, Youtube and the BBC Archive, but unsurprisingly nothing's coming up. It raises a question though; what happens to old TV footage? IIR, magnetic tape has a lifespan of about 30 years, which means there could be an awful lot of data decaying in warehouses if hasn't already been transcoded to digital.