Lemon Tree Three Feet High To Be Carried Across London

I came across a man sat on a train with a lemon tree on the table in front of him. The tree had one fully grown lemon on its branches and as the train made its way to London, I began to worry about the safety of its lemon and if it would make it home. The stalk was sturdy though. And the man definitely seemed confident that they would get there in one piece...