Looking at a tube map is there any way to determine from the graphics / icon whether two lines use the same platform or are on two sides of an island platform? My guess is when the two colors don't have a gap between them (e.g. the District and Central lines) they use the SAME platform. Correct? However if there's a gap (e.g. the Piccadilly line and the D & C lines at Gloucester Rd) is there any way to determine if they share a platform? I know that the District line and Piccadilly share a platform at Barron's Court and the depiction of the lines on the map at Barron's Court is no different than at Gloucester Rd. Why the question you may ask. Important if you're switching lines and have luggage with you. Also at Barron's Court and Hammersmith do they share a platform in both directions or only when travelling eastward (into the city)?