A Scotrail spokesperson said:
“A man was stood in front of the train out of Aberdeen this morning, we have been sat here since 8am. I understand he is now in police custody.”
“Once we are given the all clear to move, we can’t all go at the same time. The train at the back will have to wait for the next slot.
“The train coming out of Aberdeen that was stopped has had to go back into Aberdeen. It will be nearer to ten o’clock until this backlog is gone.”
For further updates please go to www.scotrail.co.uk