Hi caroline,
I got sacked from my job when i was 3 months pregnant, so i went and signed on at the job centre, i didnt find a job before i had to change my claim to maternity allowance which is a £100 a week as seaneen states, after my tribunal it was topped up to statutory maternity pay. You are only entitled to one or the other. smp is for those working and over a certian income, and MA is for those who work but under a certian income or only work part time. The additional, is if you want more time and are willing not to have any income. Income support is for low earning families, usually if you have no income and are a single parent. The citizen advice bureau can tell you exactly what you are entitled to depending on your wages. And after baby is born you will get child tax credit and child benefit.