Quality used cars & a professional service Welcome to UK Car Sales Online, offering huge savings on used cars in Hounslow Middlesex. We are an independent used car dealership based Ten (10) minutes away from Heathrow Airport. With an extensive range of second hand cars featuring all makes and models. Specialist of low Mileage cars, UK Car Sales Online can provide the right car at the right price. With so much choice on second hand cars why go anywhere else? Get the best prices and widest choice on quality used cars!