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.
Billericay railway station Billericay railway station is on the Shenfield to Southend Line in the east of England, serving the town of Billericay in the Basildon district of the county of Essex. The vast majority of services on the Shenfield to Southend Line connect to the Great Eastern Main Line, linking station in Southend-on-Sea to Liverpool Street station in London.