Complex sentence: The island is a British Overseas Territory, but about 30% of its people are of French descent, with the language still widely spoken and its main economic ties are to Guadeloupe, the UK and the rest of France.
Split into simpler sentences: The island is a British Overseas Territory, but about 30% of its people are of French culture, with the language still widely spoken. Its main economic ties are to Guadeloupe, the UK and the rest of France.