(09 Sep 2016, 7:11 pm)OW1762 wrote You wouldn't happen to know why would you?
Absolutely no idea! I couldn't see anything wrong with it on the offside and it wasn't dawdling, so I can only speculate that it had a broken window on the nearside, or something - it was heading Northbound, but we'd passed the A690 exit, so it could feasibly have been heading back to Belmont, though could have used the "new" bit of the A688 (sorry, yes, it's an addictive website) for that.