German media is reporting about a strike ballot currently held at Easyjet's SXF base:
Unbefristeter Streik bei Easyjet droht | rbb Rundfunk Berlin-Brandenburg
Result to be announced next Monday. This is for unlimited (!) strike action. German union force for you. I hope to be save with not using a SXF-based plane to London (i.e. the 7:00 to LGW), but instead a LTN flight which I think are all LTN-based planes. My guess is that only about half of the flights from SXF are SXF-based planes. The strike shouldn't affect handling agents (GlobeGround Berlin).