The Hertford East branch line, and Lea Valley lines, are both in which country?
Lea Valley lines The Lea Valley lines are two commuter lines and two branches in North East London, so named because they run along the Lower Lea Valley of the River Lea. They were part of the Great Eastern Railway, now part of the "Anglia Route" of Network Rail.
Erewash Valley line The Erewash Valley line is a railway line in Britain running from south of Chesterfield along the Erewash Valley to Trent Junction at Long Eaton, joining the Midland Main Line at each end.