A new development at least for me anyway.
I'm not sure if it was part of the interim report but I was shown a screen grab of a traffic plot submitted to the AAIB this morning.
The plot was proported to show traffic in the area of the collision for ninety minutes around the time of the accident.
The corridor between the Lynham and Brize zone appeared to be solid traffic at first glance. I appreciate that Scale and time factors make things look worse than they really are, but what was really striking was that both MATZs were both completely clear with no traffic indicated at all for the period displayed. This may have been an artifact of the data displayed, but it's worrying that aerobatics were being carried out in the area that was indicated to have the heaviest traffic.
Perhaps a few pounds spent on overtime for ATC and a manouvering block in the MATZ would be money well spent?