Owen Oyston, Blackpool’s controversial owner, has put the club up for sale, http://www.bbc.co.uk/sport/football/41944602 following losing a legal case with fellow investor Valeri Belokon. Wealthy they may be, but, after the court ruling, in which Oyston and his son, Karl, were ordered to pay Belokon £31.5 million, both Oystons’ had their assets seized. https://www.theguardian.com/football/2017/nov/06/oystons-blackpool-ordered-pay-shareholder-high-court-valeri-belokon Establishing reliable information as to the extent of the Oyston family wealth is difficult, as between them as Owen Oyston has at least 40 directorships according to Companies House. Never popular with fans,  the Oyston empire has many tentacles, but valuing the sum of all the individual elements is difficult. One approach to unravelling the involvement of…