How do they specify direction at the Circle line tube stops? Our closest tube station will be Great Portland Street. One day we need to get to St. Pancras and another day we need to get to Paddington Station. How will we know we're getting on a train that goes the short way rather than nearly completing the circle?
Also, Heathrow to Great Portland Street: Piccadilly to South Kensington, then transfer to Circle Line? I assume we will want to go clockwise but how is this noted in the station?