Seeing as Rover is owned by a Chinese company, and collapsed in early 2005 (or was it '06), I wouldn't touch a Rover. Plus, they're meant to be pretty unreliable, and low quality too. I wouldn't go for a Corsa, due to the fact I dislike Vauxhall. Look for a second hand car that's at a good price. Pick something that's reliable and economical as well.
Personally, I'm a Ford fan, so I would suggest a Fiesta or maybe a Ford Ka.