[tomkat]

The peace sign originated with the Campaign for Nuclear Disarmament

In either orientation, Winston does not agree:

             

[TruthFactor]

Winston used it as a victory sign. V for Victory!

[P.O.E.]

True. It was the Labour Party that unseated Churchill.

[IronJack]

That's not the "peace sign." That's the "V-for-Victory" sign. At least as Churchill used it.

The peace sign is the so-called "dove's foot," found on the tie-died t-shirts of aging hippies everywhere. That was indeed derived from the semaphore signs for "ND" -- "Nuclear disarmament."