Vintage social history Tho shalt not cross a picket sign Miner or Train strike

A really nice piece of vintage social history, a handmade sign for one of the iconic strikes of the 20th century, its either from the miners strikes of the 1970s or the transport strikes of the 1990s. I believe the slogan was used in both but prolifically taken up for the latter, but I think the train strikes used printed signs ? not hand made and this one is stencilled and hand coloured on sugar card with a crude wooden pole. There is some wear commensurate with age which in my opinion just adds to a really cool thing.  Measuring 63 cm high x 45 cm wide