Complex sentence: The Bishop's Stortford-Braintree Branch Line, also built by the Great Eastern Railway, was opened in 1869 creating a route from Maldon through to the West Anglia Main Line.
Split into simpler sentences: The Bishop's Stortford-Braintree Branch Line, built by the Great Eastern Railway (GER), was opened in 1869. This created a route from Maldon through to the West Anglia Main Line.