This page has links to modern rail industry companies involved in the GWR network
GWR: the mainlines form Paddington to Bristol, Exeter, Plymouth, Penzance and the south west
Southwest Trains: Bristol to Weymouth
Arriva Trains Wales: all Wales railways
Cross Country Trains - Penzance to Birmingham and then links to North west and east
Chiltern Trains - Birmingham to London Marylebone and Oxford
Heathrow Express - Paddington to Heathrow
Rail Support Services - provides tamping, rescue services for derailments etc
DB Schenker Rail (UK) (formerly English Welsh & Scottish Railway)
ASLEF - the drivers and firemen union
National Union of Rail, Maritime and Transport Workers – guards and station staff union
Office of Road and Rail – the regulatory body for all rail operations