Hi Lucy
As far as I'm aware if you are absent from work with a illness/problem which is
pegnancy related between weeks 36-40 your mat leave/pay will automatically begin! So say if you were planning to work right til the end but you were off sick (PG related) at 36+2 then mat leave/pay would start! But if you were off 35+5 with illness then you'd be fine!
I had to be really carefull as I was off towards the end! Its very confusing........I found some info re mat leave & rights online......can't remember where

will see if I saved it somewhere!!