One of the first shops that comes to mind whenever I have been pregnant or needed baby things is Mothercare.
But, to be honest, I havent really ever bought a lot from there!
I regulalary receive their catalogue, which has a good selection of products, right from maternity, to newborn, baby and toddler.
I was desperate a few years ago for some cooler maternity clothes, it was a hot summer and I was melting! I nipped into Mothercare, and although the staff were very helpful, I found the range of maternity wear boring, small and expensive.
I dont know if its because the 2 stores local to me are not huge stores, but I always find that shopping in store, there is never very much range of products out on display. The online range is huge, Im not sure if they have items just for online, but on more than one occasion I have seen something in the catalogue and popped in store for it, but they dont have the item I want in.
I have always found their staff to be polite and helpful, and they know their stuff, so if you need more information on a product, they can help.