RAIL passengers are being urged to share their views of their experiences on board First Great Western, South West Trains and Southern Trains.
Which? is building a dossier of evidence to show companies how they need to improve.
First Great Western and South West Trains were ranked joint 15th out of 19 train companies in a train satisfaction survey, with only 45 per cent of passengers satisfied with each service.
Southern were close behind with only 46 per cent of passengers satisfied.
Overall, eight in 10 people think that train ticket prices are too high, but around half would be prepared to pay more if the service improves.
Penny Mordaunt MP for Portsmouth North, said: ‘I have long complained about the poor value for money service standards South West Trains delivers for my constituents and am convinced the only way to improve the quality of service is to have standards written into future rail franchise agreements. I am continuing to talk to the ministry regarding this.’