First off.. Take a deep breath and find your center of calm.
Done that?
Ok, now uninstall WoW, defrag your HD, and then reinstall it.
Patch up again,
I'd personally get the 1.10 patch here, but it's your call, then let the Blizzard downloader do its thing.
After that, you should install that other program, which speeds up the loading. Be advised though, that it might not be compatible with the UK version, which you have, and that this is why you're having trouble.