As it's been a week of Heavy Metal documentaries, I thought I'd add a third. This one is from the very early eighties, when the NWOBHM was in full swing. It's an excerpt from Janet Street Porter's 20th Century Box series on LWT, and features narration from Danny Baker (yes, that Danny Baker). It's brilliant, especially the rather lovely interview with a man who makes cardboard guitars ("it's supposed to look like a guitar, but it's not really supposed to look like a real guitar").