Complex sentence: In 2003 Lattice merged with National Grid to become National Grid Transco, a single company that owns the gas pipes in the UK, electricity distribution in the England and Wales and various electricity distribution networks in the USA.
Split into simpler sentences: In 2003 Lattice merged with National Grid to become National Grid Transco. A single company that owns the gas pipes in the UK, Electricity distribution in the England and Wales and various Electricity distribution networks in the USA.