Ryanair has suspended bookings for flights to and from Brussels' Charleroi airport from November 12.
Ryanair is demanding £1m compensation from the christian CNE union for a wildcat strike by security staff in June. In addition they are demanding that workers agree to maintain a minimum service during strike action. The union has reacted angrily to these attacks on the right to strike.
A law governing minimum service was recently introduced in neighbouring France and the Belgian CSC union has tried to pre-empt the introduction of a similar law by offering to make pacts with employers, whereby unions would agree to give agreed warnings before strikes and prevent wildcats.