The Reference Desk/Shada

I used to wtach the "classic" series on a local tv station and later, cultivated a friendship with a person who worked for this station.

He said they had numerous Dr Who (and other BBC shows)videos on an obsolete video format (its what made the show available widely in N America)

At some point the station upgraded video facilities and cleaned out this old equipment and tapes and he took two of the broadcast players and most of the Dr Who shows as well.

He allowed people to see the shows in his home in Vancouver BC and one of those shows I think was the Shada episode, written by Douglas Adams but never broastcast due to the labor dispute at the BBC.

Most of the tapes had notes on the boxes about broadcast dates (some as many as 10 or more, and from other stations) but this box had no markings.

Was this episode converted, sent out and then axed without being braodcast due to this dispute?