What does this advisory mean? (Ford Fiesta)?

Last year my car had this as an advisory note:
Nearside Rear Lower Front suspension has slight play in a track control arm inner bush (2.5.B.2b)
I didn't own the car then, so I don't know what it means, so if someone could explain, and tell me if its likely to be a problem this year, and how much you would expect it to cost (ballpark!) That would be wonderfully helpful!
Thank you :~)

Kayla
April 2010