With some Drivers at Northern supporting the Guards strike by refusing to cross picket lines, we know many others will be thinking about doing the same.
As we have covered in previous issues of On Guard:
YES: you can refuse to cross the picket line
NO: you can't be sacked for doing so
YES: the company is allowed to discipline you but as yet they have not done so and are highly unlikely to put themselves into dispute with ASLEF.