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.
Leamington–Rugby line The Leamington–Rugby line was a railway running from Leamington Spa to Rugby. It was a 15-mile branch line built by the London & North Western Railway (LNWR) and opened in 1851. The branch connected Leamington with the mainline from London to Birmingham (now the West Coast Main Line which had been opened in 1838 by the LNWR's predecessor, the London & Birmingham Railway (L&BR).