In truth, Canada's misrepresented somewhere far from Britain (7,2,5)

I haven't cracked this one yet — but the brilliant team at Times for the Times have:

Actually as far from anywhere as it’s possible to be, with a history of habitation through sheer obstinacy. I remember it blowing up in 1961, its entire population camping out in the UK until returning  a year later. Do read the history! For our purposes, it’s an anagram (misrepresented) of IN TRUTH CANADA’S