Part-time contracting whilst employed full-time

[kingcook]

so what you are saying if I am a permie developer and stacking shelves at tesco on the weekends taht i could loose my job?.9

Probably not. Unless you came into work on Monday morning falling asleep at your desk.

If you had a 2nd job as say some software developer, working on the next killer app and it happened to make you millions, and say there was some clause in your employment contract stating "we have the right to everything you do in your spare time".... then you'd be screwed.