:wave: Welcome to the Forum.... Im 18 so can't go to far back on best managers but I would say Sir Alex Ferguson even though I hate everthing about United and can't stand them at all his achievments speak for themself...
He has won 46 trophies as manager which makes him the best British football manager in the history
But in terms of ability at this moment in time I would have to say Jose Mourinho
No questions asked its Ferguson, man united weren't a top team wen he went there and look Wat he did...made them the best club in the world.... nevermind taking aberdeen to Europe gold, absolutely amazing if u ask me. Don't get me wrong I dont like him as a person but as a manger the footballing world would be worse without him.....