The Windsor Link Railway is a proposed new railway in Windsor, Berkshire, connecting the Great Western and South West Trains franchise areas and potentially linking both to London Heathrow Airport. The project is promoted by Windsor Link Railway Limited, led by businessman George Bathurst. The promoter's aim is for the railway to be a Big Society entirely privately initiated and financed. The cost is estimated as £200 million for the Staines to Slough section of the railway only, excluding the proposed work on roads and buildings.