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Originally Posted by Quoth
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But the Laserdisc used with the interactive system were factory produced from other media sent in.
No doubt the BBC didn't keep that, as they were run by bean counters and erased £85 tapes that had cost £10,000 to produce to save money from the 1970s.
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Wikipedia
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Data and images were selected and collated by the BBC Domesday project based in Bilton House in West Ealing. Pre-mastering of data was carried out on a VAX-11/750 mini-computer, assisted by a network of BBC Micro microcomputers. The discs were mastered, produced, and tested by the Philips Laservision factory in Blackburn, England.
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So likely no-one archived the data. Otherwise it would be no problem that no-one can read the laserdiscs.
I've readable floppies nearly that old and it's possible with current Linux and a 64 bit Mobo that has a floppy port to read 3", 3.5" 5.25" and 8" disks in many formats (most CP/M, DOS). But not Apple II discs or Amiga discs. I forget what floppy format BBC/Acorn drives used.
There are still working VAX-11/750 computers and tape drives. Well kept 70 year old tape still works.
You can only read DOS format on an USB floppy drive.