Alan/Andrew
The mystery 42429F VP-BIF on radar today using RLU8404 (RusLine).
Also VP-BVD (hex & c/n unknown) CRJ-100 left ARN enroute to VOG as RLU8302 this night destined for Rusline, it was all white, so probably none of the ex Delta aircraft.
Hopefully someone can shed some light on these aircraft identities.
Niklas