Choosing a Course
Courses can vary dramatically in content, but the first year at least should contain common elements such as algebra, differential equations, probability and statistics. After that, the field can be wide open so make sure that the course you are on offers the specifics you want, and that the compulsory elements aren't precisely those things that scare the living daylights out of you.
So if options such as operational research, statistics, and information maths are your thing, then make sure that those who will teach you are involved in those areas, but also make sure you know what they are. While course names in maths are generally the same across the board (the same words can mean different things in some subjects), the chances are pretty high that you haven't covered it in school, so try not to paint yourself into a corner without doing the research first.
You might also consider joint honours too - maths and computer science is a popular degree choice, and four-year degrees with a placement in industry are also available. Maths and accountancy is also a good option - many accounting firms prefer it to a straight accountancy degree. Combinations such as these, along with work experience, give graduates plenty of relevant ways to increase their employability. If you get the chance of a work placement, you should always take it, so look into the possibilities. Remember, though, that if you do joint honours, you are still expected to get to the same level as everyone else. You may think you're hedging your bets, but it's a bigger commitment.
When you're snooping around, look too at the computing department. Many computing courses are taught by mathematicians and while it isn't a hard and fast rule, a healthy computing course can make for a healthy maths course.
