By Simon Bird & Daniel Orme The ownership situation at Newcastle United has changed. The Public Investment Fund of Saudi Arabia still holds 80 percent of the club shares, but the remaining 20 percent has a new split. When the club was bought, Amanda Staveley took 10 percent and the Reuben family of property developers held 10 percent. The ownership group has pumped in £127m of “new equity investment” since their takeover from Mike Ashley, with 80 percent coming from the Saudis. But the club have confirmed that the 10 percent stakes have changed, meaning Staveley or the Reubens have reduced or…