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  1. Home
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  3. Hannah Fox
Hannah Fox - Principal researcher & writer at Which?

Hannah Fox

Principal researcher & writer

Principal researcher/writer at Which? delivering award-winning health, baby and safety investigations, including our annual sunscreen tests.

111 articles
  1. 2026

    1. 03 Nov
      A group of women walk along a park path, pushing strollers with infants, surrounded by greenery and trees.

      Which pushchair brand should you buy?

      Pushchairs
    2. 30 Oct
      A woman in a pink long-sleeve top smiles while leaning over a stroller, playfully reaching for a baby's feet in sunlight.

      Best pushchairs 2026 and buying guide

      Pushchairs
    3. 30 Oct
      A curly-haired boy in a plaid shirt sits on a potty, pulling up his pants in a well-lit living room with a couch.

      How to potty train - your helpful guide

      Nappies
    4. 30 Oct
      A caregiver changes a baby's diaper on a bed, focusing on the baby's legs, with a warning graphic that says "DON'T BUY."

      Which? Don't Buy nappies

      Nappies
    5. 30 Oct
      A smiling baby lies on a bed while an adult's hand changes their diaper, with soft lighting in a bright room.

      Best disposable nappies for 2026

      Nappies
    6. 29 Oct
      Infant lying on their back, playfully holding feet, wearing a diaper, with a soft blanket beneath

      Aldi vs Lidl nappies: how do they compare?

      Nappies
    7. 23 Oct
      A smiling father interacts with his baby girl in a stroller, gently touching her hair in a sunny outdoor setting.

      How to choose the best travel system for your baby

      Pushchairs
    8. 13 Oct
      Woman running with running buggy

      Popular running buggies, plus 3 things you should never do with one

      Baby transport
    9. 12 Oct
      Child car seat crash test showing the Britax Römer Baby-Safe Pro + Vario Base 5Z and Axkid Minikid Core

      Two child car seats fail our tests, and a crash-test dummy flies through the air

      Baby transport
    10. 08 Oct
      A black double stroller is secured on a testing platform inside a metal enclosure, with safety equipment visible nearby.

      How we test pushchairs

      Pushchairs
    11. 06 Oct
      A caregiver in a teal sweater lifts the legs of a smiling baby in a pink onesie with a pacifier, on a soft bedspread.

      How we test disposable nappies and nappy pants

      Nappies
    12. 06 Oct
      Two child safety seats in the back of an orange van, each holding a crash test dummy with green heads.

      How we test baby and child car seats

      Child car seats
    13. 05 Oct
      A toddler in a car seat with a pacifier smiles, while an infant sleeps in a nearby car seat.

      Benefits of extended rear-facing baby car seats

      Child car seats
    14. 09 Sep
      A person dispenses lotion from a turquoise bottle into their palm, with part of the text "DON'T BUY" in the corner.

      Which? Don't Buy sun creams

      Sun creams
    15. 03 Sep
      A joyful toddler in a car seat smiles and laughs while a caregiver playfully interacts with them.

      360 car seats that swivel for babies and toddlers

      Child car seats
    16. 20 Aug
      A smiling woman secures a laughing baby in a car seat inside a vehicle, with sunlight streaming through the window.

      What should I do with my old car seat?

      Child car seats
    17. 17 Aug
      Two police officers in high-visibility yellow jackets with "METROPOLITAN POLICE" on the back, standing on a busy street.

      Child car seat laws in the UK: Which? advice

      Child car seats
    18. 17 Aug
      A young girl sits on the trunk of a car, surrounded by colorful beach bags and hats, with the ocean in the background.

      Child car seat laws around the world

      Child car seats
    19. 14 Aug
      Toddler with curly hair smiles while seated in a brown car seat, wearing a green sweater and grey pants.

      Maxi-Cosi car seats - how do they compare?

      Baby transport
    20. 11 Aug
      A woman with curly hair sits on a couch, holding a coffee cup, while using a laptop displaying a menu or content list.

      How to check if a second-hand pushchair is safe

      Baby transport