Brussels launches legal action over Polish rulings against EU law

European Commission says it has serious concerns' about challenges by Warsaw's constitutional tribunal

The European Commission has begun legal action against Poland over rulings by the country's constitutional court that challenged the supremacy of EU law, in an escalation of the long-running battle between Brussels and Warsaw.

The EU executive said it had serious concerns" about the Polish constitutional tribunal and its recent case law, citing rulings where the court had challenged the primacy of EU law.