Wages will be topped up for six months, but chancellor says it is "impossible" to say how many jobs will be saved.
Nadia Whittome - who says the law could decriminalise torture - was fired by Sir Keir Starmer.
Sammy Wilson says he "should have been" wearing a mask and will "accept whatever consequences there are".
Commons authorities want to roll out the training, which is already given to staff, to all MPs.
Ministers have "over-promised and under-delivered", former civil service head Lord O'Donnell says.