Looked up ICAO B8028 in the ADSB historic flight database and while that A/C came back as existing, there were no historic flights to show. But your clue about Polet let me to a database of EU airline operators and it turns out that Polet is listed as an operator in the UK and Germany with 'operator state' listings as Russia and Bermuda. Pics Related.
https://foia.state.gov/search/results.aspx?searchText=commision+regulation&beginDate=&endDate=&publishedBeginDate=&publishedEndDate=&caseNumber=F-2015-08078