Badly - I took the chain off, took a couple of links out, and put it back on again, it seemed perfect for about 100 yards, but as soon as I put any pressure on it, it started slipping again. Not really sure where to go from here.
I have ordered a new bike, but feel like I should get the old one going so I can return it in a decent state to my sister that I borrowed it off.
It's a bit annoying to borrow something, break it, pay to fix it, then give it back! lol!