I'll vote for Malcolm Allison... almost both spells... took winning teams and trashed them. We should have built on the success of the 67/68 team, and I blame Allison for failing to translate that into enduring success. The second spell, swapping Peter Barnes and Gary Owen for Daley, was criminal. His impact on City was destructive both times, ruining harmony and finances, and leaving chaos in his wake. He got away with a lot because of his charisma, and he did good work as Mercer's number 2. But as a manager, he hurt City badly. I'm certainly not defending Ball - but for me, Allison is the worst manager we had.