To call the Jubilee Line the "youngest tube" is to acknowledge its role as the network's innovator. While the Metropolitan Line provides the Tube with its historical foundation, the Jubilee provides its future. It is a testament to the idea that even in a city defined by its past, there is always room for a new, "younger" perspective to reshape the landscape above and below the ground.
Ask readers who their favorite young creator is in the comments. Option 2: The Practical Parent Guide youngest tube