Complex sentence: Since his death, there have been rumours that Durrell never had British citizenship, but he was originally classified as a British citizen as he was born to British colonial parents living in India under the British Raj.
Split into simpler sentences: Since his death, there have been rumours that Durrell never had British citizenship. But he was originally classified as a British citizen, as he was born to British colonial parents living in India under the British Raj.