If you are pregnant and have a certificate from your GP or midwife saying that it is necessary for your health and safety not to work nights, your employer should suspend you from nightwork for the period stated in the certificate. Your employer must offer suitable alternative day work on the same terms and conditions. If there is no suitable alternative day work, you should be suspended on full pay for as long as is needed to protect your health and safety.
However, you should not be forced to leave your night shift against your wishes just because you are pregnant, where there is no medical evidence from a doctor or midwife stating that this is necessary. It is important that the working hours of pregnant women are not disrupted unnecessarily, causing interruptions to established childcare arrangements and the loss of the company of co-workers in an established shift team.