This is a matter for the independent Office of Rail Regulation (ORR), whose investigation has concluded that the problems experienced over the new year were part of a continuing breach by Network Rail of its network licence. The ORR is now consulting on its response.
I understand that Network Rail is exploring urgently with passenger and freight operators and user representatives the option of funding a package of customer improvements worth £14 million. If agreement can be reached by the end of the month, the ORR could decide to endorse this rather than imposing its proposed penalty on Network Rail for breaching its licence.