Where to buy baby stuff?

Ca

Hello British mums! I am French and I will become a first time mum in June. I am based in London and I was wondering where to get the baby stuff (prams, cots, changing table, bottles, everything!...) The only two stores I know of are John Lewis, but kind of top end budget or Mothercare. Any tips ladies? Also feel free to advise on products to buy! Thanks 🙏🏼 🙂