Hex AD968B

[Anmer]

Out of Cardiff (or possibly St Athan) heading west, no flight ID.

[Anmer]

OK, mystery solved.

This is N975DH for DHL.  Just found it on FAA website.

Ex-Ethiopian B752 stored at St Athan.

Skyliner:

Boeing 757    -23N    27975    779    N975DH    DHL Air    ferried 20-21jan16 DGX-BGR-GSO for freighter conversion    ex ET-AMU

https://www.planespotters.net/airframe/Boeing/757/27975/N975DH-Astar-Air-Cargo