A beautiful photo. Flanker in the AM. I didn't know Ukraine had twin seat Su-27s. Is this a Su-35?
View: https://twitter.com/kpszsu/status/1618876881792827392?s=61&t=omvYZgNmR6B2N1aSYxuHAg
It will be a Su-27UB1M which is essentially a standard Su-27UB, first acquired back in the USSR days and inherited by the Ukrainians back in the early 1990s, and then modernizized to NATO standards in 2012, which involved a minor overhaul of the radar, navigation and communication equipment. You can see some here:
Poroshenko conveys two Su-27 planes to Air Force pilots in Zaporizhia, takes off in one of them
Ukrainian President Petro Poroshenko examined samples of aviation equipment fixed by Zaporizhia State Aircraft Repair Plant "MiGremont" during his working trip to Zaporizhia region on Wednesday, according to the presidential website.
www.unian.info