Comment 4 for bug 1290270

I partly misunderstood this last night - must've been half asleep :^(

I believe if I were in a similar situation I'd download the Beta 1 torrent here:

http://cdimage.ubuntu.com/ubuntu-gnome/releases/14.04/beta-1/

Then copy the completed torrent to it's "daily image" name, eg;

cp ubuntu-gnome-14.04-beta1-desktop-i386.iso trusty-desktop-i386.iso

Then use zsync to upgrade that image:

http://cdimage.ubuntu.com/ubuntu-gnome/daily-live/current/

Of course be sure to check md5sums.

Then once you have an updated Trusty installed if a future update is interrupted you should be able to recover using:

apt-get clean
dpkg --configure -a
apt-get -f install