Complex sentence: In 2007, the club was the subject allegations of fraud and impropriety in the press; however none of these were ever proved, and the Club since then has undergone a radical transformation in terms of its business practices to ensure its efficient administration.
Split into simpler sentences: In 2007, the club was the subject allegations of fraud and impropriety by some in the press; none of these were ever proved. That said, in recent years the Club has undergone a radical transformation in terms of its business practices to ensure its efficient administration.