OP - this must be a hard thread to read & digest. Even the support can sting, because it forces us to accept the reality of our situation - I know, I've been there. The embarrassment, the denial, the minimising, the hope ...
I'm posting to say sorry to you directly for my part in the uncomfortable spat with the abuse-apologist poster. That derail must have been doubly difficult for you to read, & I am sorry that you had to deal with the heightened emotions of me & PP when you are already reeling with shock, fear & unhappiness.
However ... I really hope that you are able to look the facts squarely in the face, & appreciate WHY PP are arguing so strongly for you to take this seriously, & put some immediate distance between you & your H.
The statistics are stark, & have been quoted upthread, so I'll leave that there, expect to say that every single DV expert in the UK would be urging you to leave safely, asap, even if for a few days initially.
When your H made his hyperbolic declaration of "doing everything in my power" to not throttle you again ... did it occur to you how vague that is?
How concerned are you that he did a CONCRETE THING to you, but has no CONCRETE PLAN to even begin making amends for it?
That he has shown no contrition, no remorse, & his first instinct was to lie, then his considered response the next morning was to double down on that lie?
Here are concrete things he could be doing - & WOULD be doing, if he had a shred of genuine guilt, or an iota of horror at his own actions:
Report himself to the police
Take himself to the GP, & seek urgent help. Either with his suddenly & highly specific "amnesia", or for his uncontrolled violence. Or both.
Contact a mens' violence organisation, register himself, start work on why he allowed himself to hurt you
Read up on DV, on why men throttle women, what the stats & outcomes are for the woman, following even a single episode of throttling
Stay with a male friend, or book himself into temp accommodation, leaving his wife safely in the marital home while her sorts himself out.
He's done none of that.
All hes done is lie, & tried to coerce you into being complicit in that lie.
btw - there is NO POINT in him doing any of the above if he is only doing it because you ask him to.
If he doesn't think of it himself - it's worthless. A gesture, just acting out in order to stop you from leaving him.
He should be leaving YOU. Anybody who felt an ounce of shame would have already departed. Even temporarily. The fact that he hasn't shows he expects you to suck it up. That is a very, very dangerous attitude for a man to have about a woman.