Not sure about Southamption in particular, but Law generally involves suprisingly little in the way of lectures [as compared to say Medicine]. You're expected however to do a mountain load of work on your own, such as reading cases, writing notes and general research.
Some find it easy enough to cope with and have time to get jobs and so on, others find it harder and literally spend every second of their day working.
How easy or hard you find it is [in a sense] up to you pal. Good luck with the LLB anyway, I just finished mine and I'm nostalgic already...