Railway workers from the RMT are refused to work on Wednesday and Thursday this week and will do so again on Saturday, June 25 in protest against what they deem to be unsatisfactory pay rises and job security.
Despite being a non-striking day, travellers in the North East and Scotland are facing major disruption on Friday.
Following an incident on the line on Thursday, LNER is unable to run services between Newcastle and Edinburgh today.
LNER wrote on Twitter: "#LNERUpdate Following an incident involving a road vehicle on Thursday 23 June, we will NOT be able to run services between #Newcastle and #Edinburgh in either direction on Friday 24 June.
"We are advising customers DO NOT TRAVEL between Newcastle and Edinburgh on 24 June.
"If you no longer wish to travel, you can claim a refund from your original point of sale. If you bought your tickets from LNER, this is under My Account then My Bookings, or in the LNER App."
LNER have not provided rail replacement bus services for ticket holders to use.
The train providers are hoping to re-assess the situation at midday and look at the possibility of resuming services.
Network Rail Scotland are currently working to resolve the issues, caused by an HGV destroying a lineside cabinet.
At 7:30 am on Friday, Network Rail Scotland Tweeted: "Update on Wallyford.
"Good progress on repairs overnight, but unfortunately the East Coast Mainline between Edinburgh and Berwick-upon-Tweed hasn't reopened though it's imminent.
"Repairs ongoing to the signalling system, following the HGV destroying a lineside cabinet.
"This will be done as quickly as possible, and we’ll keep you updated. Teams overnight successfully removed the HGV and repaired damaged overhead line equipment, boundary and retaining walls and replaced 2 rails as a precautionary measure.
"We've worked with @ELCouncil to close St Germains level crossing between Prestonpans and Longniddry to road traffic.
"This is so we can fully assess the impact of any signalling system damage to the crossing equipment.
"We’ll continue to work closely with our train operators, who’ve made changes to their timetables for this morning. Please do check your journey before you travel. More soon."