Complex sentence: Academic estimates suggest that there is between 250,000 and 300,000 ethnic Turkish or Turkish Cypriots who have immigrated to the UK; however, the total number, including British-born Turks, is about 500,000.
Split into simpler sentences: Academic estimates suggest that there is between 250,000 and 300,000 ethnic Turkish or Turkish Cypriots who have immigrated to the UK. However, the total number, including British-born Turks, is about 500,000.