Conversation so far:
where does the great western railway start and end
Great Western Railway operates long-distance inter-city services along the Great Western Main Line to and from the West of England and South Wales.
where else does the great western railway operate besides along the great western main line to and from the west of england and south wales
GWR provides commuter and outer-suburban services from its London terminus at Paddington to West London, the Thames Valley region including parts of Berkshire, parts of Buckinghamshire and Oxfordshire.
are there any new routes the great western railway goes
Great Western Railway will also be providing and maintaining the new fleet for Heathrow Express from May 2020.

Question: when did the railway begin operating
Self-contained rewrite: when did the great western railway begin operating