Treatment of Kevin Keegan: A surprise appointment at the beginning of Ashley's reign to replace the sacked Sam Allardyce, Keegan was brought back to Tyneside for his second spell as manager - much to the delight of the Geordie faithful. But the move would quickly turn sour for all parties as Keegan resigned just eight months later after becoming increasingly exasperated with the club's transfer policy. Keegan would later win £2 million in damages and Ashley's relationship with the fanbase would never recover. Getty

The 10 biggest blunders of the Mike Ashley era at Newcastle United – in pictures