The line to
Ongar was opened in 1865 by the Great Eastern Railway, as an extension to its line from
Stratford to Loughton that had been opened in 1856 by its predecessor, the
Eastern Counties Railway. The extension was single-track, but whereas the Loughton to Epping section was doubled in 1893, the section between Epping and Ongar always remained single, apart from a passing loop at North Weald on opening. The eastern end of the loop was severed in 1888, converting it into a siding. About 14 trains each day went to Ongar; the rest terminated at Loughton or Epping. This remained the case until 1949, when the
London Passenger Transport Board's
New Works scheme extended the Central line to Epping using electric trains, taking over the railway from British Railways. The Epping-Ongar branch lost its through trains to London, and there was a shuttle service between Epping (to connect with trains to London) and Ongar; for eight years, there was the unusual sight of
steam trains and London Underground
electric multiple units side by side at Epping. The steam shuttle was hired by London Transport from British Railways, as it was felt there was no justification for
electrification to Ongar unless patronage of the branch rose. Upon taking over the branch in 1949, London Transport re-converted the siding at North Weald into a passing loop and built a second platform to serve a new westbound track. In the 1950s, there were attempts to improve the service on the branch, and it was electrified in 1957. Due to the low-cost electrification, although the branch could support eight-car trains as far as North Weald, a maximum of four
cars could run to Ongar. The voltage drop along the end-fed line was too great to support full-length trains, and the short platforms were not long enough for eight-car trains. Hence the Epping to Ongar branch was normally operated as an isolated extension of the Central line, with a few through workings south to Loughton. However, for two days every year there were through trains from London to North Weald, for the North Weald
airshow, on the Saturday and Sunday of its opening at the aerodrome almost adjacent to the station. The normal Epping to Ongar shuttle dovetailed with this service, passing the terminating trains on the adjacent line during its westbound journey. The through trains were operated as extra trains on the normal weekend Central line timetables, only four cars long due to the restricted platform length at North Weald. == Cutbacks and closure ==