Not a TV recovery, but there is a fascinating discussion on the process of tape recovery on this video by Cherry Red records about their project
to digitise a valuable audio archive of 1960's master tapes :
Quote : The fabled quarter-inch tapes got their name because they were contained and sold in 67 tea chests. Amongst the recordings are previously unheard songs by David Bowie’s first band The Konrads, recordings by Billy Fury, several songs by Tom Jones, and unheard material from The Honeycombs, Heinz and John Leyton . Also included are mastered recordings of Mike Berry, Glenda Collins, Michael Cox, The Cryin' Shames, The Outlaws, Screaming Lord Sutch and The Tornados - recordings which have languished in the vaults for five decades and should finally now see the light of day.
Further the tea chests contain demo recordings of (among others) Ray Davies, (who wrote some songs for The Honeycombs), Georgie Fame, Jonathan King, Alvin Lee, Gene Vincent, Rod Stewart, Steve Marriott and an early line-up of the band who became Status Quo. Finally it is said that there is also a demo tape of a certain Mark Feld, who later found fame under the name Marc Bolan with his band T. Rex.
Thanks Jeff for finding and posting this.There has been a lot of nonsense said over the years.. like Cliff Cooper had lost interest in them years ago and dumped them in a leaky lock up garage etc etc. Instead he comes across as a nice fella who has obviously invested his own time and money in trying to preserve them..not because he saw them as an investment(they probably face a rights minefield) but just because he felt they should be kept.