There is still one live green dot on the route, just south of Horncastle as I write. Reminds me of the Goon Show episode "The Last Tram":
Seagoon:
Yes, take your tongue off my boot. Now, some fool just phoned up and said there is still a tram at large on the Highgate-Kingsway route.
Sellers:
Oh, but that is impossible, sir. All trams have been melted down and made into melted down trams.
Seagoon:
Every one?
Sellers:
All except the one you're living in, sir.
Seagoon:
Wait! Wait, look! That tram map on the wall! There's still one flag-pin stuck in it.
Sellers:
Good heavens! I had never noticed it before, sir.
Seagoon:
What does it mean?
Sellers:
It means sir, that, that there is a tram still running! According to the flag it's a number 33. (or rider G32 in our case)
Seagoon:
When did he leave the depot?
Sellers:
1952.
Seagoon:
He's running late! He's running terribly late.
Sellers:
Yes.