I've packed and re packed my hospital bag & have used the lists that are on a lot of the pregnancy apps + advice given at the antenatal class... The most important things & those I wouldn't have automatically thought or are:
Lanolin nipple cream
Lots of old "Bridget style" pants
Nursing nighty (I too got a nice one from M&S)
Essential oils (lavender is calming)
Travel phone charger (you are not allowed to use a normal plug in hospital as they have to be tested- fire regs)
CD or music station (battery powered)
Bikini top (planning for a water birth)
Baggy/comfy day clothes
Toothbrush & other toiletries
Change for parking & snacks
Jelly babies & isotonic drink
Notes & birth plan
Vests, grows, mitts, hats, nappies (rec. x20ish), cotton wool, muslins, blanket, booties, car seat.
I think that's about it?
Oh we have got a crossword book to occupy time.
I believe the hospital supply all you would need for formula feeding as its rarely needed in hosp, they're more likely to encourage expressing of breast milk... Also the hospital supply as many towels as you will need! Xxx