Ok so things didn't go the way I thought they would. A very brief summary.
I didn't have anything packed as I was waiting for parents to turn up, once they did, they were asking me how I was etc, and if I was sure I wanted to do this, while we're sitting down talking my ex turned up with her friend in tears.
My mum (or mom for you guys) is quite understanding, so she starts conversating with her to try and find out what's wrong.
She turned up after work and I locked her out last night so she had nowhere to go, I didn't tell her why I locked her out, I've been really distant with her and it's because I've been seeing people behind her back and I've not been nice to her at all, she just can't deal with it anymore, so she want's to grab her stuff and leave.
I'm listening to all this in disbelief, how she can talk this much crap with a straight face, let alone doing it with fake ass tears rolling down her face is something else. Her friend with her arm round her being quiet as a mouse is the icing on the cake.
The conversation moves onto the flat, and obviously the tenancy agreement, so while everyone's in the same room a call is made to the estate agents (or letting agents) to see the best way forward. After speaking to the landlord they're able to do an assignment, this is where they can basically assign the tenancy to me, all that's needed is a deed of assignment which my ex would need to sign, and obviously permission from the landlord.
Long story short but as there's not too long on the agreement my mum will cover the half that my ex was paying, and I'll be staying here for now.
There's obviously paperwork that needs to be done, and I'm hoping that my ex will still be co-operative once things are in motion.
She's grabbed her clothes and the dog and gone to her friends house. I didn't make any objections about the dog, as I didn't want to start something, when this might actually be the smoothest outcome for now. We paid half for the dog, but she always viewed her as more her's. Carrying him in a bag etc.