If it is a 'first offence', I'd guess you are looking at a Caution. I know that Common Assault is a Summary Offence, and therefore cautionable if you admit it. Not sure about Sec47 ABH though, but you could google it.
If they offer you a caution you can refuse it (eg if you think you've got an evidential or public interest defence), in which case the matter will be referred back to CPS and may or may not go to court. The other option is that they may decide to take no further action.
Sorry not to be more help, but just want to say you have my greatest sympathy, this is a dreadful and traumatic thing to go through. I have been there. I hate the way they make you feel ashamed and to blame. Just remember, you're still the person you know you are, despite all of this. All the best.