The NOTAM I saw refers to the area being closed from 1255-1410 UTC on 27th June with traffic forming up in mid-Channel and running North. I'm not sure how far inland they will come, but the Bishop's Waltham VRP is withdrawn, so maybe they will come that far.
Practice days are Mon-Weds dependent upon weather.
Portsdown Hill might be a good place from which to view.