Great Portland Street is on the Circle, Hammersmith & City, and Metropolitan lines. Yes, that’s three lines for the price of one station. It’s like the tube map decided to throw a little party and invited all the yellow, pink, and maroon trains.
You won’t find any Bakerloo or Central line trains crashing that party. Sorry, not sorry. So if you’re heading there, make sure you’re on the right-colored stripe.
Wait, Why Three Lines? That’s Overkill!
Great question, and I love your energy. These three lines actually share the same tracks for a good chunk of Central London. It’s a bit like three friends walking the same path home, but they each go to different suburbs at the end.
The Circle line is, well, a circle (mostly). The Hammersmith & City line is a pinky-pale line that goes west. And the Metropolitan line is the fast one that shoots out to the posh countryside. They all stop at Great Portland Street, so you’ve got options.