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.
Stamford Hill railway station Stamford Hill is a London Overground station on the Lea Valley Lines, serving the Stamford Hill area which straddles the boroughs of Hackney and the Haringey in north east London. It is 5 mi down-line from London Liverpool Street and is situated between and . Its three-letter station code is SMH and it is in Travelcard zone 3.