Who is the real Labour Party leader?

Jeremy Corbyn became the Labour Party leader by accident. I am not suggesting that the Labour selectorate didn't vote for him in their hundreds of thousands, for they most certainly did. Rather I am suggesting that if the hard left of the Labour Party had realised they had a chance of capturing the leadership of Her Majesty's Loyal Opposition, they would never have put forward Corbyn as their candidate.
Once it became clear that Corbyn would win, many of us in the soggy, central mush of practical get things done politics (actually where the vast majority of Conservative, Labour and Lib Dem voters - as opposed to activists - are) were genuinely alarmed that a firebrand Trot was going to instigate class war and lead the revolution.
I guess in some ways Corbyn would like to do that, but there is one very good reason why he cannot - he is actually pretty useless.
Corbin cannot organise the revolution because he cannot lead. A lifetime spent only meeting and debating with people who agree with you has left him totally ill-suited to leading the Labour Party anywhere other than the wilderness. His speeches are hopeless and his media appearances are a case study in how not to deal with journalists. Reading out questions from the public in the manner of a local radio DJ was not an example of a enlightened new way of conducting Prime Minister's Questions (Cameron can deal with that kind of stuff with his eyes shut) but rather an admission by Corbyn's advisors that he cannot do the job of calling the Government to account himself.
We now find ourselves in a situation akin to that of Liverpool Council back in the Militant days of the early '80's. Then the Liverpool Labour Party had an official leader noone can remember (it's a good pub quiz question) but actually the Party was led by the eloquent, charming and fantastically extreme deputy, Derek 'Degsy' Hatton.
Today Labour's real leader is certainly not Jeremy Corbyn. Nor is the official Deputy, Tom Watson, in charge. Watson is a professional resigner who is fighting a rearguard action to maintain his credibility having over reached himself by turning an admirable campaign to expose the mistakes made by the authorities in failing to investigate child sex abuse, into some kind of anti-Tory Salem style conspiracy exposé.
I suspect the real leader of the Labour Party is now John McDonnell. He is a better debater than Corbyn, and actually much more able. I have little doubt that had he thought there was any chance of winning he would have run for the leadership himself (just as he tried to do when Gordon Brown was enthroned by a cowed Labour Party).
Corbyn is completely reliant on McDonnell. It is why he took the extraordinary decision of appointing this divisive and feared figure as his Shadow Chancellor to the disappointment of nearly every Labour MP. Corbyn will do whatever McDonnell wants - it is John McDonnell who is now the de-facto leader of the Labour Party.
Oh and by the way you quizzers it was John Hamilton who led the Liverpool Council in the early '80's.