Wheely does not currently provide child seats in London. By law, children under the age of 3 can travel without a car seat or seat belt if sat on an accompanying adult’s knee in the rear. Children aged 3 years and older can travel without a car seat if they wear a standard seatbelt.
More information can be found on https://www.gov.uk/child-car-seats-the-rules/when-a-child-can-travel-without-a-car-seat