Paul Weaver wrote:

Do most trains now run London-Leytonstone-Newbury
Park-Hainhalt-Woodford-Leytonstone-London non stop? It's a long
trip from Roding Valley or Chigwell via Hainhalt, and change at
Woodford means no seat at the busiest times, as well as adding 5 or 6
minutes to the trip.

None are advertised on the indicators in central London and stations as far
as Stratford.

From recollection, some of the early tube maps featuring the eastern
extension (including some before it opened) always showed Hainault as a back
to back terminus but showed only a through route at Woodford. Would it be
too chaotic to run three roues from Leytonstone - to Epping, to Woodford via
Hainault and Hainault via Woodford, thus providing through services to all
routes for everyone, but without turning trains round? (Okay South
Woodfordians would have to change, but Snaresbrook is within walking
distance of Wanstead down a very pleasant high street.)