Under-pressure Transport Secretary Chris Grayling has defended his handling of the rail timetables saga, announcing compensation for commuters and an inquiry into what went wrong.
Mr Grayling said there had been "major failures" and pointed the finger at the rail industry for the way new timetables were implemented.
Labour said he had failed in his responsibility and should resign.
There have been repeated delays and cancellations in parts of the network.
This is despite hundreds of trains being removed from service after the industry attempted to introduce new timetables last month.
Northern Rail has since brought in a new temporary timetable that removes 165 services a day, but on Monday more than 100 trains were still cancelled or severely delayed, affecting passengers in Manchester, Lancashire and the Lake District.
Govia Thameslink Railway, which runs Thameslink, Southern and Great Northern, has also introduced a reduced service.
In the Commons, MPs from across the House voiced their anger at the disruption caused in their constituencies, while opposition parties urged him to "fall on his sword".
I think the technical term for what is happening to Grayling in the Commons right now is a shoeing - some normally supportive tory MPs calling this a ‘disaster’, Labour MPs spitting chips— Laura Kuenssberg (@bbclaurak) June 4, 2018
Tory backbencher Sir Nicholas Soames said the timetables had been an "absolute disaster" and his fellow Conservative Nadine Dorries said it was "another crisis" and called for six months' free rail travel for season ticket holders.
Labour's Lilian Greenwood, chairwoman of the Transport Committee, said Network Rail and the rail operators had "undoubtedly failed dismally", but also asked why Mr Grayling would not "take any responsibility for his department's role in the shambles endured by passengers up and down the country".
Mr Grayling said the reasons for the Northern and GTR failures were different, but that "neither company had a fallback plan" with the government wrongly told that the timetables were deliverable.
A compensation scheme, funded by the rail industry, will be drawn up to offer "appropriate redress" to customers.
It should offer similar compensation to last year's Southern Rail disruption, he said, adding: "Commuters in the north are as important as commuters in the south."
An inquiry, by transport professor Stephen Glaister, will look at the implementation of the new timetable - which will now be introduced in phases.
"I will not hold back from taking appropriate action if the review finds that there's been negligent behaviour," Mr Grayling added.
Labour's transport spokesman Andy McDonald said nobody would take responsibility for "Great Britain's rail industry", but that Mr Grayling was "ultimately responsible" for ensuring the companies fulfilled their contracts.
"He is the man in charge, allegedly," he said.
"He might want to blame Network Rail but he has failed in his responsibility to oversee it... the buck stops with him."
Earlier, ex-defence secretary Sir Michael Fallon said his former cabinet colleague needed to "get a grip" on the situation. "This is becoming a scandal," he told the BBC.
He said his Kent constituents were unable to get to work or travel to school.
"It really is time now that ministers got a grip on this and force Thameslink to get on and run a decent service," he said.
If necessary drivers should be borrowed from other companies, he said, calling for the option of stripping the company of its franchise to be considered.
Asked about Mr Grayling's role, he said: "He's got to find some solutions to this.
"Clearly the transport secretary has to demonstrate today that he has this situation on board and that he's ready to use all his powers to start putting this right... commuter patience is running very thin."