Complex sentence: His immediate and extended family members are one of the largest Bangladeshis settled in Luton and has families across the United Kingdom, mainly in West London, Birmingham, Tower Hamlets and Scotland.
Split into simpler sentences: His immediate and extended family members are one of the largest Bangladeshis settled in Luton and has families across the United Kingdom. They are mainly settled and living in West London, Birmingham, Tower Hamlets and Scotland.