Hi Ian
According to Airframes and the FAA, UGP is the code for Shar Ink Ltd, a Russian cargo charter airline, so perhaps the GazpromAvia plane was operating a sub-charter. We already have the GazpromAvia logo for their code of GZP, but I see it's changed on their website to a plain blue instead of their previous blue and red, so I've done a replacement for that.
Rod