I am doing a Masters in Maths and Computer Science at Loughborough. I'm currently in my first year, I don't know about other unis obviously, but at Loughborough I'm currently doing four modules in Maths and one in Computer Science in my first semester and then three in maths and two in computer science in my second semester. The Computer Science stuff is pretty easy, even if you are learning from scratch, the first year for me is mostly bringing your maths skills up to university level.
Also I've been told by employers at career fairs that graduates with this degree are highly employable, it is incredibly rare for a computer science grad to not have a job after graduation (of course you do need a decent grade at the end of it all).