The migrant crisis is also high on the agenda, with divisions among member states over how to solve the crisis.
Austria has infuriated European Union leaders by capping the number of migrants it takes in, undermining Germany's push to seek a joint EU solution to the refugee crisis in tandem with Turkey.
SBS Europe correspondent Brett Mason is in Brussels.
He's told Peggy Giakoumelos British PM David Cameron arrived in Brussels, ready for a fight.
