Train operator Avanti West Coast has been handed a short-term contract extension by the Department for Transport (DfT), the FirstGroup-owned company said.
The operator has struggled with reliability and punctuality during parts of the past year.
Its contract was due to expire at the end of March but has been extended until October 15.
FirstGroup chief executive Graham Sutherland said: “We are working closely with Government and our partners across the industry to deliver a successful railway for our customers and communities.
“Today’s agreement allows our team to continue their focus on delivering their robust plans to continue enhancing services for our customers, including further progress on our train upgrade and refurbishment programme.”
Transport Secretary Mark Harper said an improvement plan produced by Avanti West Coast after the DfT previously handed the operator a six-month contract renewal in October 2022 “is working”.
He said: “The routes Avanti West Coast run are absolutely vital, and I fully understand the frustrations passengers felt at the completely unacceptable services seen last autumn.
“However, there is still more work to be done to bring services up to the standards we expect, which is why over this next six months further improvements will need to be made by Avanti West Coast.”
The decision to extend the contract was slammed by Labour’s shadow transport secretary Louise Haigh.
She said: “Avanti has literally broken records over the last six months for delays and cancellations, and the Conservatives’ answer is to reward failure with millions more in taxpayer cash.
“If this is what success looks like to ministers, it shows that under the Conservatives our broken railways are here to stay.
“The next Labour government will put passengers back at the heart of our railways, and build the infrastructure fit for the century ahead unlocking jobs and growth.”
Avanti West Coast runs trains on the West Coast Main Line between London Euston and Glasgow Central, with branches to Birmingham, North Wales, Liverpool, Manchester and Edinburgh.
It is a joint venture between FirstGroup (70%) and Italian state operator Trenitalia (30%).
Avanti West Coast slashed its timetable in August 2022 in a bid to improve reliability.
This came after passengers suffered weeks of short-notice cancellations, partly due to a sharp decline in the number of drivers voluntarily working on rest days for extra pay.
A new timetable introduced in December 2022 with a “significantly reduced reliance on overtime working” has seen the number of weekday services increase from 180 to 264, the DfT said.
But Labour said 24.6% of Avanti West Coast services were at least 15 minutes late in the four weeks to January 7, which was the second highest of any train operator in Britain at any time on record.
FirstGroup also announced that Andy Mellors has been appointed managing director of Avanti West Coast with immediate effect.
Mr Mellors previously held senior roles at Great Western Railway, South Western Railway and most recently as managing director of the group’s non-franchised rail businesses.
He takes over from First Rail managing director Steve Montgomery, who has been acting managing director of Avanti West Coast since September 2022 following the resignation of Phil Whittingham.
The contract for TransPennine Express – another FirstGroup-owned operator with performance problems – expires on May 28.
This will be “considered separately with a further announcement in due course”, according to the DfT.