Of course I remember you!
I'm sorry things didn't work out, but the way things were going, I think it's all for the best and admire you for making that decision!
I would give him a little more time to respond to your email and if you don't get a response, either send him nothing or try to estimate what your portion of the expenses is, and send him a check. As far as exchanging things you have at each others' places, I do think it's a good idea to make the exchange at your dad's office in London and to not see him.
If you hear nothing back from him, I'd give it the month's time and then proceed with the plan I mentioned above. On the one hand, while you and your family don't want this hanging over your head and want it done with, asap, it's really your choice based on your feelings and either way is fine.
I think you've come out of this stronger and better for the life experience!
The next time you want request me by name (if you need to! : )), I'd appreciate it if you could please post in the 'General' category, start your post with my name, as you did, here, and also write, 'Please Leave in General.' Thanks!
Take good care, Joanna and I sent you my warmest regards,