Chesty Morgan -
DC, our company has a First Officer on the jump seat, as a safety pilot, for the first few sectors of line training, even for a pilot from within the company who is new to type. Alternatively it could have been someone on a familiarisation flight and that could be an OPS bod, cabin crew, a new Captain or F/O or anybody else really.
So, even though one of the F/Os was in training, we don't know who was sitting where yet, I don't think. Or.....who was the Pilot Flying.