I've just got around to watching the BR episode and it's the best of the lot in my opinion. There's some magnificent footage of the electrified Harton Colliery with one great shot of the shunter riding a wagon being gravity shunted with his foot on the brake. It would give any H&S inspector an aneurysm! There's also footage of the Woodhead line in it's last years, the Metropolitan line with footage of the LT Pannier, Battery locos and the Q Stock. Also featured is the industrial steam at Mountain Ash in the 70s and some S&D footage.