Well D and my mum went and looked at the car. They found out that it hasn't got power steering, but other than than all seemed good. Since I was at work my mum couldn't get hold of me at the time, but decided that she'd go for it and put down a deposit. It may be a bit odd without power steering, but since it'll be a lot smaller and lighter than the cars I've driven lately, hopefully it won't be too much of a problem. After all, a couple of weeks ago I couldn't see myself driving my mum's car, but out of necessity I have, and that's been fine. So I'm sure I'll get used to it soon enough.
I just rang up my insurance company and sorted all that out too, so hopefully if all goes to plan we'll be picking up my car on Saturday afternoon :-)