Simplify the following text for a Grade 8 native English-speaking person.
Original: The Great Eastern Railway ( GER ) was a pre-grouping British railway company , whose main line linked London Liverpool Street to Norwich and which had other lines through East Anglia .
Simplified: The Great Eastern Railway ( GER ) was a pre-grouping British railway company . The company 's main line linked London Liverpool Street to Norwich and had other lines through East Anglia .