The English Premiership , currently known as Aviva Premiership Rugby or more commonly the Aviva Premiership because of the league 's sponsorship by Aviva , is a professional league competition for men 's rugby union football clubs in the top division of the English rugby union system .
The English Premiership is a professional league competition for rugby union clubs in the top division of the English rugby union system . It is currently known as the Aviva Premiership because of the league 's sponsorship by Aviva , Champions .