Tory MPs with leadership ambitions are not known for their honesty. They are better known for stabbing their best mates in the back and pretty much being willing to sell their own mother for the chance to be prime minister.
Such is my cynism for the current crop of senior Tories, I do not see swearing on your children's life as a sign of innocence.
May will be gone soon enough, and with this cloud hanging over him, the only way to save his career will be for Williamson to profess his innocence loudly.
He isn't particularly well known so this scandal gives him an opportunity to get his profile up which will boost his leadership ambitions - especially if he is able to cast himself into the role of the victim of remain beaucrat Sedwill in the press.
It certainly does NOT harm his ambitions despite what this appears to be on the surface. It can only help him with the grassroots Tories.
He is a character who is particularly disliked by Tory MPs themselves. He was chief whip and had a reputation at being good at it. A little too good. He prided himself on his machivellian ways to get others to do what he wanted. He is known for his manipulative ways. He kept a pet tarantula in his office to scare and intimidate. He also has a reputation for leaking ridiculous stories to the press, including some about himself, in order to get what he wants and to raise his profile. The 'Sergant Pike' image isn't necessarily a bad thing - its disarming and makes him sound harmless - the whole eccentic buffon thing has worked well for Johnson.
When he got his job at defence there were LOTS of Tories who made comment about how he had schemed, manipulated and plotted to persuade May to give him the job.
Its got to be said that he has a lot of enemies and 'being honest' isn't the first phrase that people who know him will use to describe him.
He might well be innocent, however the phrase 'couldn't happen to a nicer bloke' is apt, because his previous behaviour and reputation don't lead you to the conclusion that he is innocent and believing his oath. However you cut it, he is a deeply unpleasant man and there aren't many people in parliament who will be rushing to argue to the contrary on that score.
Excuse me if I therefore struggle to find any sympathy for Williamson, even if he is innocent. The situation he finds himself in, is in part, due to his 'previous good character' afterall.