I'm afraid, OP, that whilst your situation is difficult and stressful, the laws regarding driving license, MOT and insurance are there to protect the innocent and are meant to apply to everyone equally, regardless.
As somebody with a relative who was seriously injured by a non-insured lad who hadn't passed his test, I can tell you that these things matter.
How far away was his place of work? I would ask him this question if I were the judge/magistrate.
The fact that you allowed him to drive the car uninsured and without an MOT is not great for you either.
Your circumstances may generate a little sympathy, but should the law be switched on and off? I would say not, otherwise the young man I mention above, can simply claim at will that he was depressed, going through a bad time etc, and so not really at fault in causing injury to 2 people (he was actually a joy rider and a chancer, and I gather, with no real remorse - exactly the type of person who will try and get away with a misdeed if the law allows it).
As others have indicated on here, best to apologise, and he will need to make alternative arrangements to get to work. If you apologize sincerely, this may work in your favour, and you may get off more lightly than you otherwise would have done.
If you had the temerity to try and make excuses, blame everyone else etc, then if I were the judge I would throw the book at the pair of you. But I admit, I'm partly thinking of my relative.