How old is the building/communal system?
If it's relatively recent (less than 4-5 years), then the developer may have had the foresight to include twin sat feeds to each flat.In which case you should have a quadruplex ( 2 sat ,1 TV aerial, and 1 FM/DAB aerial port) wall plate/point fitted , like below....
If so you will be able to use the Full Sky+ facilities. If they only allowed single sat feeds then you'll have a triplexed (1 sat,1 TV aerial and 1 FM/DAB aerial port) wall plate/point,like below...
In which case, you'll be limited to only being able to record what you watch!