This is the second test flight of the Angara-A5 launch vehicle. It carries mass simulator payload which is to be delivered to geostationary orbit.
Reverting to GO since the information about delay was not confirmed via insider source
Angara A5/Briz-M is an Angara A5 with an Briz-M upper stage previously used on the Proton launch vehicle.
Khrunichev State Research and Production Space Center is a Moscow-based producer of spacecraft and space-launch systems, including the Proton and Rokot rockets and is currently developing the Angara rocket family. The Proton launch vehicle launches from Baikonur and Rokot launches from Baikonur and Plesetsk. Angara will launch from Plesetsk and Vostochny.INFO WIKI
After a six-year pause, Russia has resumed flight tests of its next-generation Angara rocket with a demonstration mission from the Plesetsk Cosmodrome on Monday. The Angara-5 vehicle lifted off at 08:50 Moscow Time (05:50 UTC), carrying an…