General secretary Mick Cash said.
“It is highly damaging that instead of focusing on the talks process Network Rail have opted instead to threaten a dash to the courts to challenge the democratic decision of rail worker members of one of our sister unions.
RMT will not allow this legal manoeuvring to cloud the real issues in this dispute over jobs, safety and pay justice. RMT will continue to engage in talks while we also finalise the preparations for our national industrial action