Congratulations!
I found mothercare a bit rubbish quality for clothes although they grow so fast it doesn't matter. I was told that people buy you loads of clothes, but in our case they didn't (toys instead!!). So suggest you get some basics - a few sleepsuits, long sleeve vests and short sleeve vests. Also trousers as changing nappies when they're in a sleepsuit is a bugger. And something to keep warm if you have a winter baby - a cardie, hat and gloves.
Don't worry about going to one place - just make a list and you can get most stuff online at kiddicare, mothercare, next and M&S (great clothes), john lewis etc.
Moses basket - used it for a few weeks. We bought one after DS was born as realised we did need one. Depending on the size of your baby, you might use it up until 5 months as some people I know did.
Baby bath - used for 4 months. We got given one. See if you can borrow or get a cheap one. It's easier than using your own bath or sink (if your taps get in the way!). To be honest, you don't need to bath every night anyway. Best thing we got and use every day for washing and nappy changes is a top and tail bowl. Cost about £5.
Nappies - don't spend a fortune on reusables as we did . Get a sample pack and have some disposables on standby. We found reusables too big for DS at first.
Don't bother with nappy wipes unless out. You can buy a pack of cheap flannels and use with warm water. Much better for poo!
Other useful things: muslins, swaddle blankets, bouncy chair, sling (a must), sleep bag (much easier than blankets unless you swaddle at night), BF pillow if feeding and a flask (if you're BF, you'll want a hot drink on tap for the nights ).