92010 on the northbound Lowlander has sat down just north of Lockerbie. There's a 1Z99 approaching from the north (which is presumably 92028, the portion loco) which is currently at Beattock, so it might not cause too many issues - the first northbound TPE has been cancelled at Carlisle, but the northbound Avanti isn't due for another 45 minutes yet.
Edit: Not going smoothly. 1Z99 sat at Beattock on the down line for 45 minutes and the first northbound Avanti, 1S34, has been at Carlisle for 30 minutes (now cancelled).
Edit: 1Z99 has now disappeared from the map so presumably it has arrived at 1S26.
Edit: Now on the move, 189 late.