Yeah but its all about layering for newbies anyway so you can layer up or down as appropriate.
Just a boat load of vests and sleepsuits. With the second you don't have time to dress them up in cute outfits - DD2 wore sleepsuits all the time until about 6 months old. Bung a cardigan and a blanket over the top with a ha for going out.
DOn't forget to buy newbies sized nappies - I was busy congratualting myslef that I had everything from DD1 when I twigged that the littlies would not fit in a toddler pull-up.
Anything else that is required - despatch an adult who is gettting sleep to go get it!
Hospital bag - an outfit for coming home that will fit you and be comfortable. Three or four cheapo nighties (primark?). Warm socks. Spare hairband. Plenty of cheap mummy knickers. Pack of maternity pads. New baby nappies and wipes. Coming home outfit for baby (I put dd's in a plastic bag within my hospital bag so if dh dressed her, he couldn't fail to find what he needed). Vaseline for your lips (if you have gas and air you will get v dry lips). I took drinking straws and a CD.