In case anyone wonders, someone named Paragon on someplace called Metafilter had this to say on the subject of "real or fake."
"Certainly a fake - the particular poses have been lifted from Steamboat Willie:
Mickey whistling: 0:35
Peg-leg Pete frowning: 0:54
Parrot laughing: 1:27
Minnie cranking: 4:32"
Someone else points out that the HSE REGS poster refers to the UK version of OSHA. Probably newer regs than black & white Mickey, and certainly the wrong country's regs.