I think it depends on the hospital...
most have glass bottles of some milks (Cow&gate aptamil and SMA) which you attatch to a nuk teat to feed your baby and these are given free of charge..but am aware of some places charging for these or using vending machines to dispense them (disgraceful)
Your best bet is to ask your midwife next time you see her or phone your post natal ward...they may even have info on the hosptial website.
Good luck with your new baby x