The RMT union, which campaigns for the railways to return to public ownership, has said that next year's fare rise is a "kick in the teeth" for rail passengers.
With the “flex” rule passengers are facing fare increases of up to 5.5% at a time when wages are stagnating. People will simply be priced off the railways while the greedy train operating companies are laughing all the way to the bank. This is a kick in the teeth for the millions of British people who use our trains ... With Northern Rail already axing off-peak tickets, with others set to follow, we are once again ratcheting up the highest rail fares in Europe to travel on some of the most clapped-out and overcrowded services ...
The cost of some train tickets could be almost 6% higher next year.
Rail commuters will be paying close attention to the announcement of last month's Retail Prices Index (RPI) figure today, as it will be used to calculate increases to next year's regulated fares, including season tickets.
Ticket price rises are capped at 1% plus the July RPI figure, expected to be around 2.6%.
Train companies can add another 2% to some fares, as long as the overall average remains as per the formula.
Campaigners say ticket prices are rising four times faster than the average wage and that the measurement used to calculate fare increases has been discredited.