Eurostar Service Update
National Strike Belgium 08 + 15 December 2014 Due to a National Strike in Belgium on the 8th + 15th December 2014, Eurostar services on the Brussels route are likely to only be able to operate to and from Lille Europe on that day.
Sunday 7th + 14th December 2014 The impact of Belgium strike means that the last 2 trains from London St Pancras on Sunday 7th + Sunday 14th December will be changed as follows: Train 9156 originally departing London St Pancras at 19.04 local time will now depart 30 minutes earlier. The new time will result in the 9156 departing London St Pancras at 18.34 arriving Calais 20.29, Lille Europe 21.00 and Brussels Midi 21.38 local times. Please check in at least 30 minutes before the new departure.
http://www.eurostar.com/uk-en/travel-information/service-information/eurostar-service-update