Virgin's website says to check back another day as reward seats often become availabel nearer to departure. Can anyone confirm whether they have experienced this happening, particularly with UC seats becoming available closer to departure date?
Yup - happens all the time.
It's worth checking to see how busy the flights your after are, using Expert Flyer (check your profile page for the free queries codes), and if they aren't too busy, chances are revenue management at VS will eventually release more to the reward pool.