On Saturday and Sunday (August 1-2), there will be no service between Cockfosters and Heathrow for all terminals from 4am. However, trains will continue to run between Acton Town and Uxbridge, with rail connections available between Heathrow terminals. Replacement bus services will be in operation to ease the disruption, covering the route between Acton Town and Heathrow Terminals 2 and 3, as well as Hammersmith to Heathrow Terminals 2 and 3. The closures will affect the entire Piccadilly line, with no service throughout from 12.30am to 4am on both Saturday and Sunday. Passengers can use local buses via any reasonable route between Clapham Junction and Battersea Park or Southern trains between Battersea Park and Clapham Junction.