There's been repeated efforts to depopulate the Island by the UK government because it's expensive when you have to do drops like this - the people living there want to be there and prior to them getting there it was an uninhabited island.

I'm not really sure it meets the definition of a colony in the modern sense of the word.

Just to let you know: Colony: "a geographical area politically controlled by a distant country"

If it's verboten, then I'm guessing:

All Arabs back to the Arabian peninsula? "Latin Americans" back to Europe? The removal of 98% of the USA, Australia, etc? Malagasy back to Madagascar?

Sounds very genocidal... At least half of the world's population uprooted at least :/