i think the standard approach is that u 1.cannot work on ur idea, during work time 2.u cannot start an idea that is a direct competitor to ur companies busines

i think the standard approach is that u 1.cannot work on ur idea, during work time 2.u cannot start an idea that is a direct competitor to ur companies business if these two do not apply u shud be ok, but the laws are harsher here in the uk. with non compete clauses etc