[Restoration73]

Regardless of the foregoing, my "Hayes on Record" (1993 book) gives the impression that HMV was the only label monitored for quality. A modified turntable with three arms was used to automatically detect clicks (the record was played backwards) as these were easier to detect against the recorded signal. The move from Blyth road to Uxbridge road meant a new factory where all waste vinyl was recycled.