Between about 1967 and 1978, large amounts of older material stored in the BBC's various video tape and film libraries were either destroyed, wiped, or suffered from poor storage which led to severe deterioration from broadcast quality.
Mellem omkring 1967 og 1978, store dele af ældre materiale opbevaret i BBC's mange videobånd og film biblioteker blev enten destrueret, udslettet, eller led dårlig opbevaring som ledte til alvorlig forringelse fra udsendelseskvalitet.