It would appear that the DA-42s had a swift - for a DA-42 - trip back from dusty places via Amman, Akrotiri, Corfu and Wiener Neustadt. Callsigns used were Ascot 3776 (ZA180) and Ascot 3778 (ZA179).

All three of the Da-42s recovered into Boscombe Down. I assume that they are still there as they have not been reported in the wild since. perhaps they're having their mode-S boxes fixed as on the day these photos were taken they were showing

hex 43C5BA callsign ZA179 (actually ZA179/callsign G-DOSA) but this code is Alphajet ZJ645

hex 43C5B9 callsign G-DOSC (actually ZA180/ callsign G-DOSB)

hex 4403F0 callsign G-DOSC (callsign G-DOSC) hex of OE-FOG it's previous ID

I guess they borrowed the mode-S boxes from QinetiQ for the flight home.....