Bummer! Oh well. You can, but you need to cycle out 16 villagers before Diana will want to move back in, even if you ask her when she's in boxes somewhere else. I could be wrong-- google a bit to make sure?
Says you're in England so I'm a little hopeful about this, since people not in the US can't seem to connect. I've had 5 failed tries :/
I tested a European connection and it was ok!
125 TBT and 2m bells will be fine! Adding you, please VM me when you want gates open. If connecting fails, let's try adding each other as best friends, I read somewhere that it works for some people. Otherwise, I can't do anything. I'll take payment when you're in town and can verify that Diana is there