I've not seen the 2009 date suggested before, but people have been
trying to get rid of the Circle for at least 70 years.
If one wanted to go further back neither the Metropolitan nor the
District Railways wanted it in the first place.
The fact that the Metropolitan created the District Railway shows that
they did want it "in the first place".
--
Mark Brader, Toronto | "I don't know about your brain,
| but mine is really bossy." -- Laurie Anderson