It is a tale of two major Premier League football clubs. And two billionaires. And how their close relationship and the opaqueness and secrecy of the companies they own in offshore tax havens has led to questions over who owns what. As a result, campaigners are calling for changes to the rules intended to safeguard the independent ownership of Premier League teams. The story begins with Arsenal and a very rich supporter, the Uzbek-Russian oligarch Alisher Usmanov. Ten years ago, Usmanov decided to buy a stake in the London Premier League giant whose home is the 60,000-seat Emirates Stadium, and he turned to the Isle of Man law firm Appleby to get it done. Documents seen by the Guardian show Appleby being instructed by Usmanov to handle his accumulation of a 30% stake in Arsenal over 10 years from August 2007. Nine years later, Appleby – the firm at the centre of the Paradise Papers leak – also administered the acquisition of a major stake in the Liverpool-based Premier League club Everton for another businessman, the Monaco-resident Farhad Moshiri. Moshiri is a long-term business partner and employee of Usmanov, and until he bought into Everton he co-owned shares with him…