^^ There is the problem in one.
Union movements have had their day and now amount to little more than a protection racket.
It is no longer 1832. Workers are no longer serfs tied to a farm. If you want better pay and conditions you can now freely travel to the next village and look for better terms there, or turn your hand to a different trade.
If the unions do strike it will fail. As in 1926. Yes, the “golden” general strike which resulted in the workers returning to their jobs, without a single concession. The good news is that a general strike today is likely to result in one thing: Boris Johnson and co will get their way and we’ll have proper laws to restrict the ability of unions to threaten the prosperity of the nation.