Looking for BBC Railway Documentary from 1980s - 1990s - Trains Magazine

Every Thursday night for a month (or two) my father would stay up late and record off the television what I think was a BBC-produced series on the history of steam railways and railroads in general.

The documentary appeared in six or seven hour-long segments. It covered the beginnings of the industry, development of diner cars, politics behind railway regulations and rules, Scotland and fishing, narrow guage and an entire segment on the Flying Scotsman in the 1920s in movies and it's ill-fated trip to the US in the 1970s.

 The documentary included one British guy travelling through and narrating the entire series with live footage of heritage operations as well as interviews and vintage video.

The series aired on PBS in the United States when I was about 10 years old -- 1990-1991, I think.

 I haven't seen or heard about it since, but would like to obtain copies so my son can watch it. It was really well done.

 Many thanks for any help you may provide.

Ignatius