article_snippet.sent: Jerry Grayson said: 'It's bizarre that it's now being used to sleep in.
article_snippet.sent: If I'd fallen asleep in a Mark 1 35 years ago, it would have cost me my life.
article_snippet.sent: it didn't feel like three decades ago that I'd last set foot inside. '
article_snippet.sent: But when I looked at all the switches and dials I realised I can't remember how to start the thing.'
article_snippet.sent: It then serves one final useful role as a teaching tool for young engineers or for airport fire services. '