"We're a victim of our success" Michael Roberts, Director General of the Rail Delivery Group, representing train operators and Network Rail, said.
Mr Roberts told Good Morning Britain that the UK's trains are so busy because they are affordable, refuting claims that fare hikes are pricing people out of rail travel.
Rail fares have been rising faster than the rate of inflation for more than a decade. So how do you make your money go the furthest by rail?
What could the impact of rail fare rises be on your wallet? Compare selected season tickets before and after the forecasted rise.