I didn't read that part "the employee would need to give notice the day before the redundancy notice". It's very thin legal ice here given she is pregnant and about to start maternity leave. It can be argued that although the written notice was given the same day as the redundancy notice, that there was a verbal notice given three months ago and she is now selected for the wrong reasons i.e. for being pregnant. She can further argue that she gave the notice to the employer early in the day and only later in the day received the redundancy notice. Her maternity notice couldn't have come as a surprise but the redundancy is not something verbally discussed well in advance, connected with prenatal appointments etc.? All I can say, don't rely on public forum information. If the employer is convinced that the job she is doing is redundant, then get professional legal advise. By the little information given so far, I see thin legal ice.