Off the top of my head - grobags or swaddles? You'll need some sort of bedding.
Wipes? (we liked reusable cheeky wipes until he weaned onto solids then his poos were too grim).
Nappy bucket for reuseables.
You'll need a hat, a snow suit and a car seat for taking them home.
Also a thermometer for if they're ill. NHS24 will ask what their temperature is and make you feel crap if you don't know! 
The Braun thermoscan is good.
And depending on how big your house is and where they'll sleep - a baby monitor. I love our video one as you can see if they are squeaking in their sleep or if you need to go and settle them- rather than listening outside their door trying not to wake them! But loads of folks do without especially in the first months as they are usually in with you.
And what about feeding - FF or BF? If the latter you'll need much less: maybe breast pads if you leak, nursing bras and tops, a comfy cushion and a pump / bottles if you want to express feeds. FF needs much more kit sterilisers, bottles, formula etc.
Baby bath.
Errrrr I've got a list somewhere I used first time. eBay and second hand sales were really useful.
We managed without a Moses basket. We had a bednest crib which clips onto your bed and was a godsend for night BF as you don't have to get out of bed, and he napped in that, the buggy or on me. Mostly the latter if I'm honest for the first few weeks months.
For us the bednest, ergo sling, Velcro swaddles (prems like to be swaddled, bigger babies tend to prefer not to be) and tuppence and crumble star blankets (as he hated snowsuits and you can wrap / unwrap them and put them in the car seat without waking them!) were the most useful things in the first few months. And a book called 'What Mothers do' really helped with the mental transformation post birth.
For you maternity pads and witch hazel liquid kept in the fridge are a godsend if you get sore lady bits or stitches! 