ScotRail says it has put on extra carriages and buses to deal with the demand for services on the new Borders Railway.
The company says delays have been caused by a range of factors, including a train failure, signal problems and heavy passenger loadings:
It's been a momentous week for the Borders, with trains returning to the area for the first time in almost 50 years.
Thousands of people have flocked to use the new line and - despite extra carriages being added to many trains - it has been particularly busy on board some services, as expected.
At times this has caused delays while these unusually large numbers of customers board and alight. We are aware of the ticket machine issues and are getting these fixed as soon as possible."
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