I just wanted to thank you all for your messages about me doing the 3 x 25 minutes work with a newborn. I wasn't aware of KIP days and you guys brought them up and offered me links, and I managed to speak to my employer about it today and it has been confirmed I will get both maternity pay and I'll be able to take those 10 KIP days which will cover me for 10 weeks of my side job (1 day a week).
A huge weight off my shoulders and I can now start relaxing!
Thank you all!