It’s in the evening after dark
When the blackleg miner creeps to work
With his moleskin pants and dirty shirt
There goes the blackleg miner

So join the union while you may
Don’t wait till your dying day
For that may not be far away
You dirty blackleg miner

Blackleg Miner (traditional - Roud 3193) - listen to the Steeleye Span version, ideally from the Back in Line album - and don’t break the strike!