A CALL has been made for an investigation into why the punctuality of London to Scotland trains on the East Coast Main Line reached a seven-year low in the first month of being brought back into public control.

Just 62.6% of London North Eastern Railway's (LNER) Anglo-Scottish services arrived within 10 minutes of the scheduled time between June 24 and July 21, according to Network Rail data.

This was lower than any four-week period under its predecessor Virgin Trains East Coast, which operated from March 1, 2015 until June 23.

It was the worst punctuality figure for the route since December 2010.

Perth-based bus group Stagecoach and Virgin Trains, which had a 90% and 10% stake in the venture respectively, handed over control in June after running it since 2015.

The Herald:

Trains on the vital route between London and Scotland are now being run by the Department for Transport's (DfT) Operator of Last Resort, branded as LNER.

LNER said the many of the issues were beyond its control and involved a combination of hot weather, infrastructure problems and the introduction of new timetables.

Dr John McCormick, chairman of the Scottish Association for Public Transport said there needed to be an investigation into what is going wrong.

He said: "The majority of the delays these days are down to infrastructure failures which are the responsibility of Network Rail. Timetables are also a Network Rail issue.

"I think there is needs to be an investigation into these failures to find out if some of the signalling equipment or other equipment needs to be replaced. A spokesman for LNER said: "We have had a challenging period due to a number of external factors, many of which were beyond our immediate control."

These include hot weather, infrastructure problems and the introduction of new timetables which caused disruption at key locations such as London King's Cross and Leeds.

He added: "Now that the transfer to LNER is complete we will bring a renewed focus to the operating detail of running the railway.

The Herald: Network Rail signalling problems at Kilwinning resulted in trains being off on Monday.

"We continue to work with Network Rail and other operators to identify areas where further improvements can be made and to drive these forward to consistently improve the customer experience."

The first LNER service departed from Newcastle to London King's Cross at 7.54am on June 24.

The development came after operators Virgin and Sir Brian Souter's Stagecoach, could no longer meet the promised payments in the £3.3bn contract.

LNER are to operate until a public-private partnership takes responsibility for both trains and track operations in 2020.

The Herald: Sir Brian Souter, Stagecoach chairman

It was the third time in a just over a decade that the government has called a halt to the East Coast franchise.

The East Coast route connects London King's Cross to stations in the North and Scotland including York, Leeds, Newcastle, Edinburgh, Aberdeen and Inverness.

The latest analysis does not take into account the disruption chaos on July 27 when hundreds of rail passengers were left stranded after lighting strikes damaged signalling.

LNER had advised passengers not to travel "due to the extreme weather conditions and signalling failure".

British Transport Police said officers had to hold back passengers trying to get on platforms at Leeds station.

Network Rail was approached for comment.