Shadow Transport Minister Maria Eagle told ITV News the rail fare increases represented a broken promise from David Cameron:
"When Labour started doing this ten years ago we weren't in the middle of a double-dip recession with austerity and everybody's living standards being squeezed in the way in which they are now.
"As it became apparent that times were getting tough what Labour did was stop the train companies from charging above the cap.
"So today what people have found going to renew their tickets is that David Cameron promised them they'd be paying no more than 1% above inflation, many people have actually found their ticket price going up by 9%.
"This is a broken promise from David Cameron."
Highlighting the fact that Prime Minister David Cameron and Chancellor George Osborne are Old Etonians, transport union TSSA's protest at King's Cross featured a top hat-wearing "ToffsRUs" band.
Waiting for trains at King's Cross station in London today, passengers expressed their anger at the rise.
Outside the station, shadow transport secretary Maria Eagle joined the protest against the high fares.
Some commuters appeared to agree with the protests.
Leeds-bound hairdresser Gavin Lambert, 45, described his service as "rarely on time and often overcrowded", while his friend Kevin Gowland, 46, a musician, said people were taking to the roads as the rail service was "so bad".
Train companies are the ones profiting from this rise. The Government has caved in to pressure from the train companies to allow some fares to rise above the so-called 4.2% cap.
Transport Minister Norman Baker told BBC Radio 4's Today programme that the current fare structure was "not ideal", adding that the Government wanted to end above-inflation fare rises as soon as possible:
Forty per cent of fares, roughly, are regulated by the Government and that's a longstanding policy successive governments have had. The other 60% are unregulated and decided by the train companies themselves.
The balance of regulation and which fares are regulated is part of the fares and ticketing review we are now engaged upon.
It's not ideal - there are over 100,000 rail tickets and different prices each year to deal with. It's a hugely complicated issue.So it's important we try to get the best value for the passenger, the best value for the taxpayer and the simplest, (most) transparent system we can, given the need to ensure rail companies can price appropriately to attract people on to off-peak trains which might otherwise be running empty.
First Great Western spokesman Dan Panes has blamed the Government's above-inflation formula for the hike in rail fare prices.
He told Daybreak: "While rail fare payers are paying more, taxpayers are paying less towards the cost of travel."
The 10th above-inflation increase in a row led a campaign group to claim that the increases come at a time of "no perceptible improvement in services."
Last week Railfuture spokesman Bruce Williamson said: "Yet again, rail fares go up with no perceptible improvement in service.
"Over the last 10 years, fares have increased by more than 50% - much more than people's incomes."
TUC chief Frances O'Grady has told Daybreak that "if we bring the railways back under public control, there would be more money to invest for the future."
David Cameron misled commuters when he promised to cap fare rises at 1% above inflation.
Many commuters have faced a nasty New Year shock as they discover fares have gone up by as much as 9.2%.
The Government should come clean with commuters that this is a direct result of their decision to cave in to pressure from the private train companies to let them hike ticket prices beyond the so-called cap.
Family budgets are being squeezed, so that is why this coalition Government has taken proactive steps to cut the planned fare rises from 3% to 1% above inflation until 2014.
We are engaged in the biggest rail investment programme since the 19th century and it is only right that the passenger, as well as the taxpayer, contributes towards that.
In the longer term we are determined to reduce the cost of running the railways so that we can end the era of above-inflation fare rises.