I'm due to start maternity leave from my proper full time job in 4 weeks time. I have another casual job behind a bar, basically they txt me available shifts at the beginning of each month and I say which ones I want to do (if any). I presume once I'm on leave I won't be able to do any shifts at the casual job as it would affect my maternity pay from main job? Am I right? Obviously the 2nd job is all done properly tax and NI paid and everything but I won't get maternity pay as it's casual work.