I then imported the seed into Electron Cash on a different PC.
It showed the coins as being spent, but still there if that makes sense. It said 1bcc - (1bcc unconfirmed).
I couldn't spend the bcc either. I will wait until tomorrow and see, maybe BCC/BCH need to mine some blocks to confirm that the BCC are there, but the BTC are gone.
It's all a bit weird, I hate sending coins from wallet to wallet, I'm always scared that I will make a mistake, or that something will happen.
When you sent BTC from pre-fork EW to post-fork EW, did you just send and receive? Or did you sweep private keys? I'm trying to figure out the correct way to do this.