Michael Roberts, director general of the Rail Delivery Group representing rail operators and Network Rail, has said:
At 2.2%, the average increase in fares in 2015 is the lowest for five years. We understand no one likes to pay more, especially to go to work.
For every £1 spent on fares, 97p goes on track, train, staff and other costs while 3p goes in profits earned by train companies for running services on Europe's fastest growing railway.
We are very sorry that many passengers experienced a service well short of what they deserved last weekend. To ensure we build a better railway, Network Rail is spending £38 billion over five years alongside commitments made by train companies.
This will deliver more seats, better stations and improved journeys for passengers.
TUC general secretary Frances O'Grady said:
This year's fare hike will hit passengers particularly hard because wages are rising so slowly.
Rail fares are now consuming a huge proportion of people's wages, leaving precious little for other bread and butter expenses.
On average passengers are now paying £600 more for a season ticket and yet seeing no change in their pay packets.
RMT general secretary Mick Cash said:
The scandal of Britain's great rail fares rip off continues with today's hike far outstripping average pay increases, and it will once again hit those at the sharp end of the austerity clampdown the hardest.
Rail passengers will be hit as the price of train tickets rise by an average of 2.2%.
Regulated fares, which include season tickets, are going up by 2.5% while the average increase for all fares is 2.2%.
The rail industry said the increase is the lowest since 2010 but campaigners and trade unions argue the increases are continuing to outstrip the average rise in wages.
The Campaign for Better Transport said the cost of a Milton Keynes to London season ticket had risen by 23.5% - or £930 - since January 2010. The price of a 2015 ticket is £4,888.
The rises comes after weeks of disruption to rush-hour services. Over-running engineering work led to chaos last Saturday, with King's Cross, Finsbury Park and Paddington stations having to be closed and resulted in Network Rail chief executive Mark Carne announcing he would not be taking his annual performance-related bonus.
There are severe delays for commuters in the capital today with train services into Cannon Street station cancelled because of a "safety issue".
Southeastern services running through the station are affected and many trains are diverted to Victoria and Blackfriars.
There are currently no trains between London Bridge and Cannon Street due to a safety issue. Ticket acceptance in place. #CannonStreet
Trains will not be running into the station until at least 2pm. The problem is thought to be due to an issue with the track on one of the bridges running into the station.
Train passengers will tomorrow face the first of three August weekend part-closures of a key rail route from London to Scotland.
Work on an £81 million improvement plan at Watford in Hertfordshire means that the West Coast line will be closed between Euston station in London and Hemel Hempstead in Hertfordshire tomorrow and Sunday.
Services run by Virgin Trains, London Midland, London Overground and Southern, will face disruption.
The same closure will be in place from Saturday August 16 to Monday August 18 and also from Saturday August 23 to bank holiday Monday August 25.
Football fans are warned to expect disruption as the first of the closures co-incides with the start of the Football League season.
INFO: Broken down train at Cheddington. Until further notice all Milton Keynes services will terminate at Watford Junction
There's still widespread disruption on First Capital Connect between Bedford and Brighton after yesterday's overhead wire problems at Hendon. A limited service is now running between Bedford and Blackfriars, but there are still cancellations and delays.
UPDATE: Central London: A401 Shaftesbury Avenue N/B at j/w Piccadilly Circus - All lanes open and traffic is flowing well. ALL CLEAR.
CLEARED: Trains between Clapham Junction and London Waterloo can now run normally following Over-running engineering works earlier