These days, he seems to be on the tube all the time.

I had my phone out all the time on the tube!

Since then I've seen him on the tube quite a lot.

Or because they didn't like the television program on the tube.

And where else can you find that on the tube?

Reading a paper on the tube, off the top of my head, is up there too.

She knew just about everything that had ever been on the tube.

Well, people don't believe everything they see on the tube.

Now that's something you don't often hear on the tube.

It wasn't far from where he lived, just a stop further on the tube, but he'd not been to the area before.