Runway available
I was flying in the circuit the other day and kept hearing the AFISO saying to aircraft calling finals 'G-CD, runway available 16, surface wind...'. Is 'runway available' an official radio call? I found it pretty confusing because it sounded like he was giving information to someone who was asking for a runway other than the one in use (for a crosswind landing or something like that). What he meant to say was 'land at your discretion'. I just wondered if 'runway available' is an official call.