The drivers cab of DMU 171802 at the Rail200 Railfest at the National Railway Museum, York.

The train was all powered up, and the cab unattended, so all that was stopping someone driving hte train into the concrete wall behind or the rear end of GNER's newly refurbished first class Mk4 coach ahead was a handwritten note (just visible in the top left corner of the picture) saying "Please don't touch the cab controls, thanks"!
I can only assume that no HSE inspectors were aware of this, otherwise I'm sure teh entire train would have been declared off-limits.

Photo by Chris McKenna 01/06/2004 #cmckenna@sucs.org