Yogi 
If Frank Field was rebelling because of his principles I wouldn't have any qualms, what is going on with a handful of Blairite MP's is designed to get rid of the leadership and for no other reason and I can say that with certainty. I agree with Carnelian about Frank Field, his politics are more akin to the Tories than what the Labour Party set out to be. Blair changed the Labour party and to a certain extent Kinnock too and we lost 4 million voters because of it. Member were disillusioned with hardly any difference between the Tories and the Labour Party. JC voted on his socialist principles and voted against the whip because Blair was never a Socialist and as Margaret Thatcher once said *Tony Blair and New Labour was her greatest achievement* Frank Field also advised Margaret Thatcher ...go figure.
JC cannot deal with people that have been reported for antisemitism, he has no authority to do so, that is dealt with by the NEC. When Ken Livingston was suspended that was up to General Secretary Ian McNicol to deal with, he didn't and he also didn't implement any of Baroness Chakrabarti's recommendations either. Another Blairite who has been given a peerage by TM and is now sitting in the house of Lords in payment for the good work he did in the Labour Party for the Tories 
As for Boris, TM is stuck with him, she can't control him because she's too weak at the minute to anything about it, that's why I don't blame her for anything he says, her hands are tied if she wants to stay Prime minister.
Hope the child minding goes well 