Looks interesting, many of these are on youtube ITV regions did it too
DOCUMENTARY: The Secret Story of the BBC Christmas Tapes
On: BBC 4 (9)
Date: Sunday 23rd December 2018 (starting in 4 days)
Time: 21:30 to 22:00 (30 minutes long)
The story of the blooper-filled BBC Christmas tapes since their first appearance in 1978. These festive mash-ups of outtakes, blunders and specially filmed comedy sketches were shown to BBC staff at Christmas parties and were never meant for public viewing. Their story has not been told before - until now.