All the London railway stations :
National Rail lines : The Station is on the TFL Rail, (Liverpool Street towards Southend), via Shenfield. This station has direct access to Stratford. This station has direct access to Stratford. It is also on the new Elizabeth Line (Crossrail) which is operational into Liverpool street only, at present (February 2019).
AccessAble Access Guide : Step-free from platform to street (Platforms 2, 3 & 4 only). The station now has three lifts.
General description : See wiki
More comment : National Rail Map & Guide,