My thoughts are with the families and friends of those involved at this particularly difficult time.
In response to a Q
The MOD will run its own investigation in parallel to the CAA one.
In reply to Jolly Green,
FLARM only reports on other FLARM equipped aircraft and not transponding aircraft. Likewise systems such as TCAS and PCAS only report on transponder equipped aircraft.
There is a new system about to hit the market which will report on both FLARM and Transponder equipped aircraft, which is also ADS-B capable.
The AC Viking and Vigilant fleet have nice big Dayglo patches on their wings, which does help pic them out.
As always, good lookout is essential but these systems do help pick up those contacts that do get past the Mk1 eyeball.